After marrying her childhood friend, Yotsuba moved in with his family. On the surface, it was a happy married life, but there was one problem: her brother-in-law Kazuo's hikikomori lifestyle. Concerned for her old friend Kazuo, Yotsuba resolved to go to his room. There, she learned the reason behind his hikikomori and, despite her confusion, wanted to help him somehow... But enraged Kazuo forcefully took Yotsuba's lips. Her husband lacked such persistent and intense kisses, and Yotsuba's body began to grow hot…
