Ganta Nakami is a high school student who suffers from insomnia. One day, he meets Isaki Magari, a girl with the same condition. A strange, but special relationship forms as they share a secret and catch up on their sleep in their school’s abandoned observatory… 
 
(Source: HIDIVE)

__Agency:__ Gekidan Himawari

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Sumire Morohoshi is a Japanese actress, voice actress and singer from Kanagawa Prefecture. She is affiliated with Himawari Theatre Group, and debuted as a solo singer under the record label Flying Dog.

**Non-Anime Roles**:
- Pela - Honkai: Star Rail (VG)
- Yuni - Goddess of Victory: Nikke (VG)
- Product 08 - Goddess of Victory: Nikke (VG)
- Gallica - Metaphor: ReFantazio (VG)
- Yaiyai Yarucar - Bakuage Sentai Boonboomger (TV Series)

Nakami is a studious but cranky and antisocial high schooler who gets on his classmates' nerves. However, his bad attitude comes from the fact that he has a sleeping disorder, and frequently spends nights on end without a single minute of sleep. During the preparations for the school festival, he is begrudgingly sent to the school's astronomy observatory to gather cardboard boxes, a place which is said to be haunted by the dire happenings of the now defunct Astronomy Club. He finds the isolated place a haven ripe for him to sleep, but while rummaging around, he stumbles upon his classmate Magari Isaki sleeping inside a toppled-over locker. 
 
Isaki, unlike him, is a personable and popular girl at class, but who also hides her own problems with insomnia. Looking for a middle ground, they find that there's comfort and ease in sleeping together, so they resort to make the observatory their own private cubby to sleep... Have they found the comfort they're looking for?
 
Note: Nominated for the Tsugimanga 2020 Award in the Manga Category.

A promotional video directed by Yuuki Ikeda commemorating the release of the seventh Kimi wa Houkago Insomnia manga volume.

Mina Nono