Hinako had no choice but to disguise herself as a boy to attend Shishiku Academy, known as the top bad boy academy in the prefecture. This is a brilliant plan of her twin brother, Hikaru. Having seen the battle for top dog spot at the academy, competing with other schools, and friends she has come to know with, being in Shishiku Academy for a year she truly feels like "Shishiku is where I belong".

A new spring has arrived.

Hinako is now a second-year student and the top dog of Shishuku. She welcomes the school new term in a situation to being pursued by the freshmen students. Meanwhile, rumors are spreading that "Shishuku might be closing down…”