Beautiful mother fuyuka lives with her son. Her husband, who is on long-term overseas assignment, has been away for a long time, and she feels lonely. One day, kazuma, her son's best friend, comes to cheer for the moment when a Japanese baseball player achieves a world record. Kazuma, who has had feelings for fuyuka since he was young, suddenly kisses her lips. Despite her own will, fuyuka feels her heart racing uncontrollably. Later, when kazuma presses her again and steals another kiss, fuyuka's suppressed adulterous desires ignite...