Gimai Yobai Seikatsu ~Okoshitara Owari, no Hazudatta~ (RJ01719800)

“…Yuto-san. That’s not a massage, is it?”
Six months ago, he became Mai Shirase’s stepsister when his parents remarried.
She’s the ace of the rhythmic gymnastics club and has a boyfriend, but they only kiss.
From the night his parents left on a long business trip,
he began touching Mai while she slept, under the guise of “massage.”
Every day was a struggle between guilt and pleasure.
Waking her would mean the end. The deeper she slept, the bolder he became.
–But one day, he woke Mai!
He quickly showed her a video he’d taken while she was sleeping.
“…You don’t want your boyfriend to see this, do you?”
A relationship from which there was no turning back.
Threatening her unwilling body, he slowly exposed her.
From the formal “Yuto-san” to the sweet “big brother”
–To fall, or to hold on?
The time limit was until his parents returned.