Genkan Mae de Kao no Yosugiru Downer-kei Bishoujo wo Hirottara

A man discovers a girl named Hito sleeping in his underwear on his bed after he enters his room. He knows little about her except that she is attractive and lives nearby. Hito avoids her home for unknown reasons, and the two begin a sort of shared living arrangement. She behaves in ways that suggest she is emotionally fragile and indifferent to social norms, such as wearing borrowed clothing without covering herself after bathing. She also appears at school to give him lunch, which causes classmates to speculate about their relationship. As she slowly becomes more open with him, he finds himself increasingly drawn to her despite the complications she brings.