Please! Freeze! Please!

Synopsis

Due to low budget, the school library has no heating installed. Despite that, however, a trio of classmates have to perform their library duties, regardless of how cold that makes the two girls, Tsukami and Iidabashi. Everything appears to get solved, though, when the two discover that Mayumura has a high body temperature. That is, until Mayumura gets a boner, and, embarassed, confesses that he likes them both, after which one thing leads to another, and any complaints about temperature are slowly forgotten. (Source: AniList)