A girl named Mari is in an abusive relationship with her former friend (who happens to be identical to her), Juri. Juri contacted The Hotline to Hell because she and Mari had a close relationship that was ruined in her eyes when Mari briefly considered having an upperclassman as her tennis double instead of Juri. Juri has been forcing Mari to do exactly what she says, otherwise she'll pull the string. Ichimoku Ren becomes involved when trying to get more background on Mari and figuring out why Juri hasn't pulled the string yet. Juri gives Mari an album of pictures of them together. After going to get Juri's lunch, Mari runs into Ren and hugs him when he comforts her. Juri, having followed Mari in order to tell her she's decided to forgive her, is angry that Mari could be close to anyone else and runs off to pull the string. Mari tells her they'll always be together, but at that moment Juri is hit by a car and fatally injured. Mari pulls the string on the doll so that they'll be together in Hell and, shortly after she's taken, Juri arrives in Hell. Somehow, Mari has taken the album with her.

树里和麻里总是关系很好。无论在学校还是校外总是在一起。但是维系这两人的，确实稻草人的红线。

Une jeune fille s'est connectée au Courrier des Enfers pour se venger de sa meilleure amie. Mais au lieu de dénouer la ficelle, elle décide de la faire chanter, en la forçant à exécuter tous ses ordres. Elle finit cependant par aller en Enfer à son tour pour rejoindre sa meilleure amie. Quant à Ai et Kikuri, elles se mettent au yukata.

いつも仲良しの樹里と麻里。学校でもプライベートでもいつも一緒だ。しかしこの二人を繋いでいるのは、わら人形の赤い糸なのだ。