hubungan shiba tatsuya dan shiba miyuki
Tatsuyaand Miyuki are siblings of the same school year and children to Tatsurou Shiba and the late Miya Yotsuba with Tasuya being 11 months older than Miyuki; their parents had a loveless forced marriage, and when their mother died, their father married his mistress, Sayuri Furuha, leaving the siblings to live by
.