[Nakaura Tomoki] Ueno-kun Has Been Developed Chapter 29

A nervous, glasses-wearing male apologizes to a flushed, cap-wearing tomboy as she struggles to speak, their bodies tense with embarrassment. The scene shifts to a bedroom where the female lies provocatively, the male watches, and a hidden sex toy is revealed, prompting frantic attempts to conceal the intimate act. They seal a silent pact to keep the encounter private, standing on a quiet street as they promise not to tell anyone.