Chaos erupts in the Host Club when Hikaru and Kaoru begin to fight. Their usual flirtatious twin routine falls apart, leaving guests concerned and the club shaken. All of this seems to stem from the fact that Haruhi can tell the twins apart, the first person to be able to do so.
Ritsu Kasanoda, a misunderstood delinquent with a scary reputation, seeks help from the Host Club to confess to a girl in his class who's moving away. Though blunt and awkward, Ritsu surprises everyone by quickly realizing Haruhi is actually a girl — a fact the rest of the school hasn’t caught on to. His gruff charm and chaotic presence shake things up, but the Host Club rallies to support his goal.