A young man reminisces about his childhood crush on Fumika, an older sister figure who always let him join her in baths. After years apart due to marriage troubles and a hiatus from work, she returns home unmarried but still treats him kindly like old times. One day when their parents are away, he can't resist his feelings any longer and forces himself upon her despite knowing it's wrong. She accepts him too, just like how she used to take care of him during their shared bathtime experiences. They have passionate sex multiple times until they both reach climax...*Content may vary depending on distribution method.*
