Twin Sister Days ~Let's do it, Big Brother~

Takahiro's father a widower, remarries. Takahiro is happy to have a new family and he his even happier when his new twin stepsisters welcomed him with an "I always wanted a Big Bother!" He is very happy, however he can't help but think his new sisters are too clingy. One day, Takahiro is taking a bath as usual, when he hears the sound of the bath door sliding open, his two sisters, fully naked walk in, "Why are both of you naked?" he panics "Why are you holding that thing!?" A condom. His twin sister, both identical in appearance charge at him, he wants them to stop, they are his sister after all, but it feels too good.​