Worried about Shota-kun's poor academic performance, Rui visits his home to find out what's going on, but his excuse turns out to be completely unexpected. He confesses that he can't concentrate because he's distracted by "your big breasts, sensei." Shocked by his honesty, Rui is flustered, but Shota seizes the moment—ignoring her concerns—and begins mischievously groping her large breasts, driven by his secret desire. The scene captures his innocent curiosity gradually evolving into budding arousal as he continues his playful assault on Rui's ample chest.