Chisa Kotegawa is Iori's cousin and a first-year mechanical engineering student at Izu University. Chisa appears to more level-headed and serious compared to other characters. She has a clear dislike for rowdy behavior and can be quite hostile, especially when it is directed towards her (especially with Iori). She rarely takes part in drinking or crazy antics and is usually seen sitting off the side as an observer. She loves diving and looking at diving equipment. Chisa is one of three female students in her class idolized by her male classmates due to her major's lack of females.

~!It is later revealed that she and Iori are not related by blood since Iori's father is adopted by her maternal grandparent.!~

A new life begins for Kitahara Iori as he begins his college career near the ocean in Izu city, full of excitement for his new life. He will be moving into his Uncle's diving store "Grand Blue." There he finds the beautiful ocean, beautiful women, and men that love diving and alcohol. Will Iori be able to live his dream college life?

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She moved to Tokyo at 15 to pursue a voice acting career. She is a voice actress affiliated with Avex Entertainment. She was training at Maho Academy previously. She's a cousin of [Junya Enoki](https://anilist.co/staff/119319).

Won a Best Lead Actor award at the 17th Annual Seiyu Awards (2023).

After moving out on his own to a seaside town, Iori Kitahara makes a college debut he never anticipated. A new chapter of his life unfolds, full of diving with beautiful girls and shenanigans with a gaggle of lovable bastards! Idiot-expert Kenji Inoue and au naturel authority Kimitake Yoshioka bring you a glorious college tale filled with booze-fueled antics!<br><br>
(Source: Kodansha USA)