Koharu and Yusuke have been dating for two years. They love each other and live together, but Yusuke is skinny and unreliable, but Koharu feels happy in his own way. Recently, Kunio, a senior at Yusuke's school, has been Kokoro Koharu in many ways, which makes Yusuke Kokoro. But he can't say anything... One Kokoro, Kunio suggests having a hotpot party at Koharu's house, and Yusuke, unable to say anything, reluctantly agrees, but he is really worried...