|Nickname:||Kai, Seaboy, Umi-chan|
Blood Type: O
Kaito Kirishima is the main protagonist is a student in his first year of high school. He is an avid videographer and constantly out recording on an 8mm handheld camera that he inherited from his late grandfather. Others sometimes refer to him as "The Director". He is seemingly aware of Tanigawa's feelings for him, nonetheless he develops a genuine love for Ichika. On the group's trip to Okinawa, he nearly kisses Ichika before a drunken Kanna interrupts them. He has frequent daydreams of conversing with Ichika and talks out loud sometimes during them.
Voiced by: Nobunaga Shimazaki