(COMITIA112) [SEPIA (Ogata)] Onii-chan to Zutto Issho

Mai and her brother share a charged, secretive bond that turns ordinary meetings at school into moments of intense anticipation and complicity. Their teasing conversations and escalating physical closeness reveal an attraction neither of them seems willing to deny, with the brother’s eagerness contrasting against Mai’s conflicted reactions. The final exchange extends their promise of staying together into the future, giving the story a lingering sense of intimacy, secrecy, and emotional entanglement.