Hoshigarimasen! Katsumade wa

Kasumi Amano's initial anxiety of being assigned the same dorm room as his upperclassman Hiyori Nakatani has faded away as they grow more comfortable with each other. They have gotten so close that Kasumi mistakes a confession from a feverish Hiyori as purely platonic.

Unfortunately, Kasumi could not be more wrong—Hiyori wants their relationship to become more intimate. However, as Hiyori tends to get an upset stomach when he gets nervous, he struggles to communicate his true feelings effectively. As Hiyori gets increasingly frustrated, he wonders how he can convey his desires clearly to Kasumi.