37°C no Boyfriend

Overview

One day Wakaba gets trapped in an elevator with a boy she doesn't know, who suddenly kisses her... Wakaba thought she'd never see again, until one day when her friend Nao introduces that boy as her boyfriend Chitose! Nao also introduced Wakaba to Takaomi, a senpai from her school club. But Wakaba can't help but feel curious about Chitose…?! Includes two additional one-shots Tsukiakari no Himitsu (月明かりの秘密) and Haru ni Naru Made Matte (春になるまで待って) (Source: Shogakukan, translated)

Source: AniList