Everything below is on the page. Chapter numbers follow the
Boys Over Flowers wiki's
chapter-cited account of the manga.
The red card and the ordered attack (ch. 1-3). Tsukushi defends a
friend; Doumyouji red-cards her, licensing the entire student body to
destroy her. When she doesn't break, he announces "We'll make her
suffer slowly" and hires four students to attack her. They attempt to
sexually assault her, and Rui's intervention is the only reason the attack fails.
The campaign the red card unleashes includes, per
Current Affairs' account,
rumor campaigns, property damage, beatings, and an attempted sexual
assault. He aimed a mob at a teenage girl, four hired men reached her,
and what nearly happened was rape. Whether Doumyouji specified that outcome
the text leaves ambiguous. That it was the foreseeable product of what
he set in motion, it does not.
"The only one allowed to bully this girl is me!" (ch. 6). His
first act of protection, verbatim. The frame never changes: she is
his, and the question is only who gets to hurt her.
The first slap (ch. 9). An argument in the Atami arc ends with him
slapping her. She punches him out. It's played for spark.
His own assault attempt (ch. 15-16). Convinced she loves Rui, he
waits for her, pins her to the wall, punches out a window, chases her,
pins her to the floor, and kisses her mouth and neck. When he attempts
to go further, she cries and begs him to stop. He stops.
The aftermath (ch. 18). At the next party, SHE apologizes to HIM,
saying she'll "think of it as being bitten by a dog." He is irritated,
and refuses to apologize. Sit with the direction that apology traveled.
The expulsion campaign (ch. 44-45). Furious that she and Rui grew
close, he tries to have them both expelled, and moves to blackmail the
principal to do it. His sister has to physically intercept him.
"She's just trash compared to me!" (ch. 86). Mid-series, deep into
the love story, after she ignores him in public.
The second slap (ch. 106-107). They are, at this point, as close
to together as the plot allows. She says something that hurts him. He
slaps her, goes home, stares at his hand, and says "I did it again."
Then, rather than apologize, he asks Shigeru to be his girlfriend the
following night. The vol. 14 Viz blurb describes the pattern in the
publisher's own voice:
"Tsukasa is crushed by this but is too stubborn to apologize."
That's the record. Not paint on a uniform. Not a hidden desk. An
ordered attack that nearly became a rape, a personal assault attempt
that stopped at her tears, two slaps, and a running catalogue of
threats, coercion, and public contempt... spread across the entire
series, not quarantined in an early arc he grows out of.