Mizuho remains behind after school to tutor several students struggling with their equations, creating a quiet atmosphere in the empty classroom. Unbeknownst to the others, she has extended an invitation to her boyfriend Tomohisa, infusing the session with an element of secret anticipation. Throughout the lesson, their connection deepens in ways that heighten the tension and excitement for both. At the end of the day, Mizuho proposes that they head to her house to extend their intimate encounter away from prying eyes.