[Yamamoto Kumoi] Hokeniin-san (COMIC RiN 2006-5 Vol. 17) [CulturedCommissions] [Decensored]

When the health committee volunteer from yesterday ropes her friend into settling a debate about boys the hard way, a rowdy, sweat-soaked session of anal play leaves both young bodies trembling and dripping. The boys—urging "hurry up" and praising "A-man's asshole"—take turns enjoying the petite committee member until class begins, wrapping things up with a sly, post-orgasm tease about the first period being self-study.