Since birth diagnosed with a rare disease that affects the body and heart. Oda Ritsu never lived a normal life with a side affect being that he haves abnormal sleeping patterns. Saga Masamune a third year met the sick teen and fell in love, but after an accident Oda forgot his past and Saga. After 10 years Takano meets a young man with an odd sleeping disorder and one name, Ritsu.

Due to Takano's poor choice of words, Onodera finds himself feeling smaller than ever. Trapped in the body of his six year old self, he has to continue to navigate life between his parents, Takano, and relentless job.

When Kirishima is called away on business for a few days, things seem to be well enough as Yokozawa and Hiyori look forward to a weekend with just them two, but a fight between Kirishima and Yokozawa leave them on bitter terms before the trip; to top it all off, Kirishima and Yokozawa's relationship is finally revealed to Hiyori, who doesn't take it as well as they had hoped.