Himari has a strange dream in which she meets a man named Sanetoshi, who shows her various books containing her memories. In elementary school, she formed a group called Triple-H with her best friends, Hibari and Hikari. When she argued with her mother over buying a wrong ribbon, her mother became scarred from a falling mirror, she and her friends tried to kill a koi for its blood to heal her mother. She left elementary school due to her illness whilst her friends went on to become idols. Upon waking up after vaguely recollecting a soulmate she once had, Himari hears from Ringo about Shoma's accident.

理应已在水族馆死去的阳毬，为什么又复活了？某天，阳毬说出她的那些宛如梦境般的神奇体验。一间拥有无数藏书的奇妙图书馆，在这里担任管理员的渡濑真悧，让阳毬渐渐想起深藏于内心的某些记忆。Triple H、小孩肉鸡、企鹅帽、红苹果、命运所至之处……至今诸多没有详加说明的谜题，将在这充满悬疑感的一话带来震撼。

理應已在水族館死去的陽毬，為什麼又復活了？某天，陽毬說出她的那些宛如夢境般的神奇體驗。一間擁有無數藏書的奇妙圖書館，在這裡擔任管理員的渡瀨真悧，讓陽毬漸漸想起深藏於內心的某些記憶。Triple H、小孩肉雞、企鵝帽、紅蘋果、命運所至之處……至今諸多沒有詳加說明的謎題，將在這充滿懸疑感的一話帶來震撼。

晶馬が事故に遭った頃、陽毬は自宅で、兄弟妹三人で水族館に出かけた日のことを夢に見ていた。夢の中で、ほかの人間には姿が見えない不思議なペンギンを追っていく陽毬。兄たちと離れ、エレベーターへと乗り込んだ陽毬は、木立に囲まれた白い図書館に辿り着く。

동물원에서 길잃은 펭귄을 쫓아가던 중 정체불명의 엘리베이터를 타게 되는 히마리. 그 행선지는 지하 61층에 위치한 수수께끼의 도서관…