Hatano Genichi, a slightly clumsy but warm-hearted man, falls for Sakuta Saku — a cool-headed junior high school teacher twelve years younger than him.
Openly gay and pragmatic, Saku insists he doesn’t need love, saying, “My life is still in the trial-and-error stage.” But Genichi, ever straightforward, counters with an unconventional proposal: “Then how about we buy a house together? In both our names. That way, breaking up would be a real pain.”
Just as the two begin navigating this curious arrangement, a 15-year-old girl named Kusunoki Hotaru appears before them with an unexpected offer:
“I’ll buy you. For 30 million yen. Pretend to be my parents for the next six months—until I graduate junior high.”