[Osanpo Suisou] Tane (COMIC LO 2022-10)

When quiet Kaa-kun finally works up the nerve to confess to Ruu-chan, his hard-won first girlfriend rendezvous turns into far more than a nervous schoolboy ever bargained for. Sweet-faced but shockingly skilled, she pushes her blushing, panting boyfriend down and walks him through every first, riding him with a confidence no innocent confession should come with. The truth slips out in a single word — 'Sensei' — as the quick-learning young lover moans for her teacher instead, leaving Kaa-kun to realize the clever girl who mastered everything so fast was never that kind of girl at all.