Jun is surprised by the sudden visit of his mother's friend, Chisato. He struggles to control himself as he is captivated by her mature charm. However, moved by Jun's pure feelings, Chisato convinces herself that it will be just for one night and secretly engages in a relationship with him. The next day, unable to hold back, Jun begs 'one more time.' Chisato tries to persuade him to stop, but she is swept away by his youthful passion. However, even this brief encounter must eventually come to an end...
