Kusakabe Yuki overhears some girls saying mean things about her. Gossip is not an uncommon problem among high school girls, but Yuki is particularly worried that it's happening because she's a demi. Tetsuo is sympathetic to thr concern and makes up his mind that, as her teacher, he must protect her. Hikari, a fellow demi, feels the same way.
Onee-chan?
أختي؟
Schwesterchen?!
¡Hikari!
¡Hikari!
Hikari !
Sorellona!
Mana!
Сестрица?