Tsutsui Hikari is an otaku who largely avoids social interaction. He has only one friend at school, another social outcast, and is brutally mocked by most of his classmates for being creepy and weird. One day, he finds himself tasked with cleaning the school pool alongside Igarashi Iroha, who seems to embody everything he dislikes about real-life girls. She skips school, speaks bluntly, lacks female friends, and appears promiscuous. Yet, she is friendly toward Hikari and even defends him against those who ridicule him. Hikari’s bitterness and trust issues cause him to say quite harsh things to Iroha, but she never dismisses him as creepy. Over time, it begins to seem as though Iroha might become his first real-life, 3D girlfriend! Will he be able to handle it?