La canción de Yoru y Asa, 1

Asaichi, a mediocre vocalist, sets up a band with his friends to attract girls. In that same group is Yoru as a substitute member. One night after a concert, while they're having a little 'fun', Asaichi makes a fatal mistake. As a consequence, Yoru confesses to Asaichi how she feels about him. How will this relationship evolve marked by feverish and dizzying desire and uncontrolled jealousy...?