She smiles just for me. Her name is Kachi Shirokusa and she's even an award-winning high school girl writer!

✦A disappointed high school boy and the childhood friend who loves him respond to romantic jealousy with a revenge proposal.
Synopsis
Sueharu believes award-winning student writer Shirokusa may return his feelings until he learns she has a boyfriend. His childhood friend Kuroha, who has openly told him she likes him, observes the disappointment and proposes revenge. The resulting strategy is being developed by teenagers with strong feelings and limited professional oversight.
Sueharu likes Shirokusa, a celebrated high school writer, and believes something may exist between them. News of her boyfriend breaks that confidence. Kuroha, his cheerful childhood friend who has confessed to him, suggests revenge. Romantic disappointment becomes a shared plan whose participants clearly want different outcomes.
Kuroha sees Sueharu collapse after learning that Shirokusa has a boyfriend and responds with astonishing confidence: they should get revenge. The offer already contains a romantic mess because Kuroha has confessed her own feelings to him. One bruised crush becomes a triangle powered by jealousy, friendship, and a truly questionable plan.
The emotional maturity of a school revenge pact is exactly what the premise advertises. Sueharu feels betrayed by his own expectations about Shirokusa, while childhood friend Kuroha offers help despite wanting him herself. The setup is petty, but at least everyone enters with an obvious personal stake rather than pretending to be neutral.