Tsutsui Hikari is an otaku who avoids social situations. Hikari only has one friend at school, who is also a social outcast, and most of his classmates criticize him mercilessly for being scary and strange. He is forced to clean the school pool with Igarashi Iroha, who appears to be everything he despises in real-life females. She misses school, has a brusque demeanor, has no female friends, and appears to be promiscuous. She is, however, friendly to Hikari and even stands up to others who mock him. Hikari's resentment and lack of trust cause him to say some hurtful things to Iroha, yet she never dismisses him as strange. After some time has passed,