[DASS-630] Memories of a hot night with my sister. Mary Tachibana

Kenta, who was adopted by the Tachibana family, ran away from home because he couldn't get used to his new environment. Exhausted from his lonely life in Tokyo, he returned to his hometown for the first time in several years. It was my sister-in-law, Mary, who was the only one who had a heart for me.
However, she was already married and later became a widow after the unfortunate death of her husband in an accident. In the days they spend together again, Kenta tries to make up for the lost time... Mary seeks each other's heat to distract from her loneliness.