While running back from buying a new porno magazine, ShÅ«suke bumps into another person. They get their packages mixed up and ShÅ«suke ends up with a Boy's Love magazine that he immediately rips to shreds. When the other party, known as Mister X, discovers about the mix up, he sends ShÅ«suke a threatening note demanding its return. That night, when ShÅ«suke attempts to make an exchange with Mister X using a different BL magazine, with Nao and Iroha stalking him, he learns Mister X's true identity is that of his class rep, Mayuka KondÅ. With the threat of his porn being shredded or shown to Nao, ShÅ«suke agrees to become Mayuka's pet, assuming there will be sexual requests involved. The requests start simple, such as buying her a drink or trying her bentÅ lunch. However, the next evening, Mayuka asks ShÅ«suke to buy her a more extreme BL magazine she's too embarrassed to buy herself.
Nao Takanashi loves her brother ShÅ«suke despite the incest taboo. Nao thinks that ShÅ«suke is her blood relative, but in fact she is an adopted daughter, whose parents have died. After Nao learns the fact, she wants to fall in love normally with ShÅ«suke because siblings by adoption can marry under the family law in Japan. However, she finds herself competing with ShÅ«suke's childhood friend, Iroha Tsuchiura, and his class president and yaoi lover, Mayuka KondÅ.
