i did naughty things with my drunk sister

"if you want it, ask for it please" takuma was already tired of fighting all the time with his sister akane. one day he meets a voluptuous woman drinking in a park. suddenly the woman kisses him! her soft and comforting aroma... awakens in him a familiar feeling, soon the hood that the woman wore yields and shows her face, only to realize that that woman was...!! akane!?