Kotone was pounded by a man in the hidden room “Feast Room” of the mansion.
There is a mysterious space where incense with aphrodisiac called “aphrodisiac” is burned.
Mamoru had no choice but to look at her sister while erection …
At midnight after that, Kotone detoxifies Mamoru who is still erected by the poison of aphrodisiac.
Mamoru, who can’t fit in that alone, approaches her with her secret feelings for Kotone …!?