Because I Don't Like My Big Brother At-All--!! — Season 1, Episode 5: Mister X Strikes Brother!

Episode synopsis

While running back from buying a new porno magazine, Shūsuke bumps into another person. They get their packages mixed up and Shūsuke 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 Shūsuke a threatening note demanding its return. That night, when Shūsuke 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 Kondō. With the threat of his porn being shredded or shown to Nao, Shūsuke 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 bentō lunch. However, the next evening, Mayuka asks Shūsuke to buy her a more extreme BL magazine she's too embarrassed to buy herself.

About Because I Don't Like My Big Brother At-All--!!

Nao Takanashi loves her brother Shūsuke despite the incest taboo. Nao thinks that Shūsuke 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 Shūsuke because siblings by adoption can marry under the family law in Japan. However, she finds herself competing with Shūsuke's childhood friend, Iroha Tsuchiura, and his class president and yaoi lover, Mayuka Kondō.

More episodes from Season 1

• E1Wicked Usual Day of a Brother And Sister
• E2Twintail, Attacking Brother and Sister
• E3A Rival Appears! Brother and Sister in Huge Trouble!
• E4If My Little Sister Wore a Swimsuit
• E6My Brother has Dreams of Black Panty Stockings
• E7My Brother and His Friends' Akiba
• E8Aim for Brother's Top!
• E9Summer! Festivals! Brother and Sister's M:i:V
• E10Brother Saves the World
• E11Calling Out to Brother from the Center of the World
• E12I Don't Like My Big Brother at All!!