[Otonano Omochiya (Hirokawa)] Otonano Omochiya 23

Two sisters share a steamy secret that goes far beyond study sessions, and when one finally coaxes the other to drop her towel, their playful teasing melts into a slow, breathless first time on the bedroom floor. Just as they're catching their breath in a tangled, sweaty afterglow, a third sister walks in on them mid-tryst—and instead of scandal, she offers a helping hand with a mischievous smile. Part of an ongoing series about a household where sibling bonding keeps escalating, this chapter teases shy first-timers, eager encouragement, and a threesome that's only just getting started.