The protagonist discovers that he lives in a world where BL romances happen and learns that his brother, Ayato, received a love confession from his best friend. On his way to university, the protagonist avoids interacting with others, causing Kuroda and Yūki to bump into each other and fall in love. During lunch, his friends Ryōta and Tōma fall in love.

The protagonist is invited to a drinking party by his classmate, Sakita, who also invites lone wolf Kaji, broken-hearted Akihito, and Takimoto. By the end of the evening, Sakita and Kaji fall in love while Akihito and Takimoto become a couple.

Ayato invites his friends over, including Tōjō, the person who confessed to him. The protagonist discovers that Ayato and his friends have a complicated love square relationship.

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The protagonist is invited to a group blind date by his classmate, Misaka. Uchiumi steals the girls' attention but expresses interest in the protagonist, causing the protagonist avoid him and have him pair up with Misaka instead. After the two men leave, the group date becomes a failure as the girls have lost interest.

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The protagonist meets Mayama, who is secretly a BL manga artist, but avoids him. Mayama, who is a fan of male relationships, decides to watch over the relationships of other men, observing Hikaru and Shun falling in love and wishing that he lives in a world where BL romances are common.

Ayato realizes Tōjō is serious about him and starts to realize his own feelings for him when they become distant. The two make up and begin dating.

The protagonist finds chocolate for Valentine's Day in his bag and later realizes they are from his classmate, Kikuchi. To avoid him, the protagonist has him sit with Miyoshi, only to have Miyoshi's boyfriend, Haruo, interrupt class.

The protagonist gets drunk and falls unconscious, but he learns that Kikuchi had carried him home. Kikuchi confesses to the protagonist that he has been in love ever since the protagonist spoke to him when he was feeling upset. Despite conscious efforts to avoid Kikuchi, the protagonist eventually gives into his feelings for him.

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Mob’s new workout routine backfires when unavoidable contact sparks the ultimate romance flag.

At a Halloween party, Mob faces sweet danger when an adorable Little Red Riding Hood appears.

Mob’s sharp nose detects the “scent of love” in class, but a matching shampoo sparks confusion.

On his way home, Mob encounters a crying middle schooler—and the next romance flag appears.

An unfamiliar boy confesses to Mob, insisting they share a forgotten memory from long ago.

To dodge Hatano’s love flag, Mob plays matchmaker—but fate refuses to follow his script.

Hatano vows to confess again in three years, leaving Mob stunned by his pure determination.

Mob visits a school play to film his brother but finds himself caught in another love setup.

Mob wonders how love starts, but a simple question to his brother opens new romantic flags.

Asked to be a filming extra, Mob’s low profile crumbles as a new BL story begins without warning.

An accident thrusts Mob and Hatano into lead roles, blurring the line between acting and feeling.