A young man aiming to become a lifesaver. A playboy who grows throughout the story. He has outstanding athletic nerves and is a flirt who is popular with women. He is confident but also has a delicate side. He lives at his best friend Roki's family home, the Akiyama residence, while working at the beach house, Hareru-ya. Role: Shuto Mori (BUDDiis) Personality: Flirty/Playboy Gender: Male Age: 24 As a boyfriend, he's incredibly reliable, though he might try to pick you up before you even start dating!? 💞

A young man aiming to become a lifesaver. He has a past history with Kaito and views him as a strong rival. He joined the Water Guardians Club to defeat Kaito. He is serious and has a stronger heart than anyone else. Role: Soma Ueno Gender: Male Personality: Serious with an indomitable spirit Age: 28 As a boyfriend, he's serious, but if you ever drown in the sea, he'll save you instantly!!

A young man aiming to become a lifesaver. Kaito's best friend. He has an otaku disposition and is timid, but he cares for his friends and is kinder than anyone. He works at Hareru-ya, the beach house managed by his father. He hates exercise. Role: Eito Konishi Gender: Male Personality: Timid Age: 26 As a boyfriend, he treats you with extreme kindness!! He's timid, but...

A young man aiming to become a lifesaver. One of Kaito's friends working part-time at Hareru-ya. A muscle-bound character with a trained physique, he's a relentlessly cheerful Kansai native who often plays the straight man to Kaito's antics. Role: Masahiro Sunada Gender: Male Personality: Extremely energetic Age: 26 As a boyfriend, he's energetic every day and very kind!!

A young man aiming to become a lifesaver. A cool-headed, handsome guy who is always calm. He is the eldest among the Hareru-ya members and is relied upon by Kaito and the others. He actually has a side that is deeply loyal to his friends. Role: Kosaku Koizumi Gender: Male Personality: Cool/Composed Age: 23 As a boyfriend, he seems cool and serious, but he is very thoughtful and caring!!

A young man aiming to become a lifesaver. The youngest member of the Hareru-ya group. Although treated like a child by Kaito and the others, he follows them around like a younger brother. He hopes to find a girlfriend and experience true youth this summer. Role: Sota Nagano Gender: Male Personality: Very energetic and cute Age: 18 As a boyfriend, he's kind and has a very cute side!!

Roki's mother. She watches over Kaito and Roki with kindness. She is still head-over-heels in love with her husband, Hifumi. Role: Asuka Kurosawa Gender: Female Personality: Kind and reliable Roki's mother, someone you can always count on!!

Roki's father. He runs the beach house Hareru-ya and employs Kaito and the others as part-time workers. Role: Orakio Gender: Male Personality: An incredibly energetic father!! A reliable father figure!!