Hiroko and Kisaki were half-brother and sister. Hiroko is now 16, Kisaki is 13. Hiro's older half-sister is also blonde, of average height, beautiful build, bright blue eyes with heterochromia, and fair skin. They are similar in appearance, but there are many differences. Hiroko and Kisaki constantly quarreled and did not get along.

Parents went away for a week to visit, leaving Hiro to look after Kisaki. it was an ordinary day when her parents were not at home, and Kisaki returned home and smelled a strange smell. It turned out that it was the smell of tobacco. The blonde smoked near the window, not noticing how Kisaki returned.

At least don’t smoke in the house, go out to the balcony. - Tetta muttered in a dissatisfied tone.