Amami Hassaku♂

The game's protagonist. Mao's little brother, Airi's big brother, Mei's nephew and Arisu's cousin. Bearer of a giant cock, is in a sexual relationship with Mao. His parents always taught the siblings about the importance of love and showered them with it. As a result, Hassaku, Maou and Airi grew up to be caring and gentle people, and know how to take care of each other well.

After a certain incident, his parents decided to create a school that had "Teach about true love, a great love that envelops all" as its guideline, basically teaching that everyone should be free to love whoever they want. However, some time later they died in a accident and Mei took over as the principal. Having nowhere to go, they depended on Mei to keep studying and have somewhere to live. "Live and be happy" were the last words their mother said as she died with a smile on her face, and now the school that should be the solidification of his parents' ideals is being twisted in a money-making scheme, saddens him very much.

As the last male student in the school, he tries his best to resist against Mei's attempts to make his life as miserable as possible. As he was at the end of his ropes, his sister finally comes back from overseas. After a night of sex, Mao invites him to overtake their school back from Mei.
And so begins Hassaku's plan to recover the school that involves evading the principal's traps and schemes, learn more about the school by joining the student council and of course, teaching the ojousamas about the concept of true love.