Rito tries to work up the courage to confess to his long time crush. The universe seems to be against him, dropping a naked runaway alien princess named Lala into his bathtub.

Rito finds that he's engaged to Lala and has three days to save the planet from her alien father, King Deviluke. To make matters worse, his longtime crush is mad at him.

Lala is the new transfer student at Rito's school and even though he implores her to keep a low profile, her antics are making her rather popular.

Inspired by Mikan's hot meals, Lala tries to cook, but the results are yucky. Rito sees his chance and declares that he will not marry Lala unless she can cook well for him.

Saki Tenhouin, the queen of Sainan High School, becomes jealous when she finds out Lala's popularity is on the rise and challenges her to the Miss Sainan Competition.

Lala wants to learn more about Rito, but she may have gotten the wrong idea in science class during dissections.

A new rival for Lala's affections has arrived at Sainan Private High School: Ren, one of her childhood friends.

One of the school prefects, Yui, is all about good morality. She convinces the principal to allow her to create an enforcement squad, making Rito public enemy number one.

Another suitor blasts his way into the picture, this time quite literally, wearing an armored rocket suit, trying desperately to snatch Lala.

The president of Lala's fanclub comes to take Lala away for an idol CD, but she refuses so she needs to find a 'golden egg' to do the acting. Rito tries to stop her when the president fixates on Haruna, saying that only Haruna could work as as substitute for Lala.

Rito is attacked by a strange, golden haired girl on the street. It turns out that she is an assassin, know as Golden Darkness, hired to kill him.

The athletic festival has arrived and Rito makes a complete fool of himself, trying everything he can think of to impress Haruna.

King Deviluke is coming to Earth to see if Rito is worthy. Rito is left with only one option: become the Greatest Man in the Universe.

With Rito's Greatest Man in the Universe training underway, he runs into Haruna and they develop an unlikely relationship, which finally escalates in Rito's favor: a date!

Rito, Haruna, and Lala are moving up in the universe, when an alien prince visits and they each become Ambassadors of Peace from the Earth.

Everyone decides to have a fun afternoon together at the water park. However, Rito now has a new source of relationship drama: Run has fallen in love with him, too.

Rito and everyone decide to go to the old school to find out if the rumor of a ghost haunting the building is true.

A spaceship flies over the school and drops off a package for Lala on the roof. Inside the package is a pregnant wolf that jumps out and tries to kill her!

After seeing a commercial on TV promoting a hot springs, Lala tells Rito that she wants to own one, proceeding to build her own right in their backyard.

General Mojack decides to try and take over the world so Kirisaki takes it upon her self to destroy him by turning into Magical Kyoko Flame.

Yuuki hears about an alien hotel being run by Mikade-sensei and Kimio. There, Yuuki decides to try it check it out via the old school building.

Everyone is upset by Yui's submission of what they should do for the culture festival. She submitted that they do a region research display or a calligraphy display.

Saruyama wishes that he was a nobleman from the Edo Castle. He then starts to daydream about being the ruler of Edo Castle.

Lala's personality changes due to a fever. Rito now has to deal with Lala's constantly changing personalitues and her desire to take over the world as a deviluke princess.

Rito receives a message from the King which orders him to board the spaceship and prove he is the best in the universe. Before boarding, he confesses his feelings for Haruna.

Yuki wakes up to Haruna and Lala yelling at him that he is about to miss the ship. Lala decides she can't marry unless he wants to.

Rito is having a hard time adjusting when Lala's sisters move in and her attempted seductions leave him perpetually frazzled!

Rito learns that Yami still wants to kill him, and now she's an overnight guest in his house! However, it's not all rage and resentment! Momo continually tries to seduce Rito.

Momo is intent on making Project Harem a reality -- and she almost succeeds. Meanwhile, Mea begins to shake things up and prepares to welcome a dark force!

The vindictive Azenda the Tyrant comes to Earth to provoke Yami. Later, Haruna and Rito have yet an awkward encounter, and Mikan and Yami grow closer.

Rito dodges potential encounters with women -- and all their respective parts! -- but he soon gets a firsthand look at the female anatomy... and not in the good way.

Momo teaches Rito about the secrets of the female body and seeks to move Project Harem forward. Meanwhile, Rito learns about Ren and Run.

Rito is confused by his sudden feelings for Lala; true to fashion, things get awkward quickly! Momo and Mea also discover the true and endearing nature of Lala.

Rito begins to get closer with Momo, which makes Mikan uncomfortable. After Rin helps her during a near collapse while walking home, Mikan can no longer hold her tongue.

That Lala and her inventions. One of Lala's crazy contraptions ends up getting Rito and Yami stuck to each other by their hands!

The truth needs to come out. Yami finally begins telling Rito about her past, and explains how she came to be.

The Organization is on the move and Yami is the first target! Meanwhile, Lala learns of a new enemy that may be closer than she thinks.

Momo takes to playing dating sims to figure out how to get her harem under way. At school, a group of students form a Momo fan club, which ends up keeping her away from Rito.

A casual day for Rito and the girls becomes something more as a Devilukean drink has a peculiar effect on Sairenji.

Rito picks up a strange device that Lala dropped at school. The alien technology has an interesting effect that will leave Rito exhausted and a little mousy.

Nana retreats to her own private Safari to contemplate Mea’s true form and the words she said that may forever change their friendship.

Rito and the girls are ready to have a blast at the Summer Festival. But as Momo is enjoying rare time alone with Rito, a dangerous introduction is made.

The day after an awkward mishap, Rito bumps into Yui while boarding a train and another sticky situation occurs. Later on, Mea is invited to dinner at the Yuuki house.

Momo fantasizes about alone time with Rito, only to be interrupted by Nemesis. Later on, the bath becomes a hot spot as Momo finds Rito with someone unexpected.

Momo is concerned about the distance between Tearju and Yami, and she tells Rito as much. He decides to speak with Yami, but Mea’s contribution may be the tipping point.

Rito and the girls are enlisted to help out at the Tenjouin mansion. The girls dress up as maids for the task, but a mysterious sword turns the mansion into a battleground.

Lala wants to help Rito and Haruna get closer, but Momo’s plan needs Lala to be the first wife. Utilizing a dating sim, Momo educates her sister about expressions of love.

A vacuum Lala invented goes crazy due to Oshizu’s powers; it’s sucking up the girl’s clothes! Mea is forced to make a decision as the invention’s core threatens the school.

With everyone's acceptance of Mea, Yami is coming to a realization that will change everything; Nemesis capitalizes on this and pushes the situation to a breaking point.

Yami’s transformation takes everyone off guard; her goal stays the same, but nobody expected her methods. Mea resists against Nemesis’ hold on her body in an effort to help.

The Golden Darkness rages on the school grounds and also scares the other classmates. Lala tries to free Rito from the clutches of her dark power. The two turn all their energy against each other.

Rito decides to carry out Mea's plan, namely, to voluntarily indulge in lewd acts on Darkness so that she becomes Golden Shade again. Will he manage to carry out this operation?