Kasui Jun returns for her second exclusive Honnaka title. Three childhood friends attend a fireworks festival, but a sudden downpour separates me from one of them and leaves Jun alone with me. I have always seen her as a close friend, yet lately she has become more feminine and impossible to ignore. Rain glistens on her pale skin, her hair clings to her face, and her underwear shows through her soaked summer robe. While sheltering in an abandoned factory, I impulsively kiss her soft lips, leaving an awkward silence as the rain refuses to stop. Then Jun asks whether I can promise not to touch her. After missing the last train, the two of us race through the rain to a love hotel, where our long-hidden desire finally leads to sex and a creampie.