Tomohisa remains lost in thought after his private encounter with the alluring senior Mizuho. When he notices both his friend Endou and his secretly admired classmate Mikura have slipped away unnoticed, worry quickly sets in. He suspects the two may be sharing an intimate moment on the fire escape, stirring feelings of jealousy and curiosity. As the school day unfolds, these unspoken tensions begin to surface among the group.