Observation record of a neighbor's daughter who I've been watching over, getting married... and locking her up in the house and raping her.

After a series of troubles, Toru was getting fed up with interacting with others, and was retreating to her house. The only thing he can trust is Ichika, a neighbor's daughter whom he had been caring for since she was a child. However, she got married and gradually started to see her less and less. With more time alone, Toru learns of a man, and as a married woman, she begins to feel an adult sexiness, and before she knows she is, she becomes an adult sexiness. Then one night, she got into a fight with her husband and ran out of the house and ended up staying there...