Summer Comiket, an event so hot that you can see clouds forming inside the venue! So here's the onsen (Japanese hot springs) episode! When you have to sweat, you need an onsen. Umanohone supports Oedo Onsen Monogatari! Then... we don't know if it was summer's fault, or the yukata (light kimono) or what, but Kantoku x Hio-tan x Tsumorin x Kameko's intricate love tangle starts unfolding. Wait a minute - three girls for one guy?! Real-life achievers must die!!