I want to mess up my mom's tender boobs. The secret emotions I have had since I was little. Ryota desperately suppressed it so that no one would understand it, but it became impossible to suppress it after the day when she saw her mother Mako indulging in masturbation. Ryota who impulsively embraced Mako tells while rubbing G cup milk. "I'll comfort you," Mako pressed her chest instead of replying, kissing her enthusiastically and welcoming her.