♂ m

The protagonist of the previous BOIN. He is a Japanese teacher at Koromo Gakuen. He comes to Amanato Island to enjoy his summer vacation. He has to work part-time at the beach house "Triton" after Sal steals all his money.

♀ f

Her personality is quiet, shy, and clumsy. However, she has breasts that do not match her young physique. She adores and respects Maya and always follows her around. She always looks enviously at the interaction between Maya and Daisuke.

♀ f

Her breasts have grown even more than in the previous work, and she has a mature and sexy look. She and Mitsugu are best friends and always work together. She has a calm personality (easy-going and quite stupid), but she is a little jealous. She loves Daisuke and is always competing with Mitsugu f... read more

Her breasts have grown even more than in the previous work, and she has a mature and sexy look. She and Mitsugu are best friends and always work together. She has a calm personality (easy-going and quite stupid), but she is a little jealous. She loves Daisuke and is always competing with Mitsugu for Daisuke. As she becomes more and more absorbed in sex with Daisuke, she gradually begins to seek out more and more abnormal activities.

♀ f

She is a perfect girl who can cook, study, play sports, and do anything else. She works part-time with her best friend Momona at Triton, a beach house. She is a kind and considerate girl at heart, although she often puts on airs due to her competitive nature. Since she is Daisuke's childhood frien... read more

She is a perfect girl who can cook, study, play sports, and do anything else. She works part-time with her best friend Momona at Triton, a beach house. She is a kind and considerate girl at heart, although she often puts on airs due to her competitive nature. Since she is Daisuke's childhood friend, she calls him Onii-chan.

♀ f

He tends to be domineering and condescending, but has a soft spot for those who are obedient. She responds to various requests with comments such as, "Isn't it cute! and "Isn't it cute?" She is said to be weak when her maternal instincts are tickled. She is as skilled as a professional surfer. She... read more

He tends to be domineering and condescending, but has a soft spot for those who are obedient. She responds to various requests with comments such as, "Isn't it cute! and "Isn't it cute?" She is said to be weak when her maternal instincts are tickled. She is as skilled as a professional surfer. She travels around the world to do bodyboarding, and found a good spot, Amanato Island, on the Internet.

♀ f

She is a troubled person who loves the sea. Her personality is carefree, or at her own pace. She is laid back and never gets angry. She has a hard time deciding what to order at Triton. She looks like she's playing around, but she has a kind heart. However, when it comes to sex, she is not comforta... read more

She is a troubled person who loves the sea. Her personality is carefree, or at her own pace. She is laid back and never gets angry. She has a hard time deciding what to order at Triton. She looks like she's playing around, but she has a kind heart. However, when it comes to sex, she is not comfortable unless she takes the lead. She is a sex-crazed maniac. Most of her conversations are about the sex.

♀ f

In appearance, she has become somewhat chubbier than in the previous work. She is a very rich young lady, generous but sometimes stingy. She is smart and has a wealth of knowledge about mysticism, or rather, she talks about it almost exclusively. She is psychic. She likes Daisuke and is somewhat je... read more

In appearance, she has become somewhat chubbier than in the previous work. She is a very rich young lady, generous but sometimes stingy. She is smart and has a wealth of knowledge about mysticism, or rather, she talks about it almost exclusively. She is psychic. She likes Daisuke and is somewhat jealous of him.