The day before moving to Tokyo, Dai visited the house of his mother's friend, Momoko, a woman he admired. Before parting ways with the woman he has longed for for a long time, Dai takes advantage of the absence of his mother to convey his feelings hidden in the depths of his chest. Momoko, who was told her innocent feelings by a younger young man, forgave her body while feeling confused. - Dai dedicates his first time to the woman he longs for, and on the night spent alone with the 'first' and 'last', he has a dense affair so that he can hit the feelings that he could not convey until now.