(W) Ghost Mikawa (A) Yumika Kanade and Hiten

For mature readers

'I can't fall in love with her. After all, the two of us are siblings.' It's Yuuta and Saki's first summer break as stepsiblings. Now that Saki has started part-timing at the bookstore where Yuuta works, they inevitably end up spending more time with each other. After being around his little sister a lot more than usual, a forbidden emotion starts to well up inside Yuuta's heart...