Two childhood friends named Mai arrived at the home of brothers who had been living together harmoniously. The older and younger brother have liked Mai since long ago. Suddenly, the three began cohabiting. The relationship between the three grown-ups didn't stay the same as it was during their childhood. The older brother crossed a line, and seeing this, the younger brother also ended up having a relationship with Mai. To resolve the long-standing love triangle, Mai proposed a threesome with her brothers. The initial group play was awkward, but it gradually became more enjoyable... deepening the bond between the three.
