Nishikata doesn't know what to write for his calligraphy class, so Takagi-san suggests they should both write what they want from each other.
Nishikata wants Takagi-san to stop teasing him, of course, but what does Takagi-san want from Nishikata?
I believe it's all due to
 your lack of kindness.
.أعتقد أنّ السّبب يُعزى لافتقارك للطّيبة
Das kann nur daran liegen,
dass es dir an Freundlichkeit mangelt.
Debe ser por culpa
de tu falta de amabilidad.
Debe de ser por culpa
de tu falta de amabilidad.
C’est parce que
tu manques de gentillesse, tout ça !
Dev'essere colpa della tua assenza di gentilezza.
Acredito que seja
porque te falta gentileza.
А вот будь ты подобрее,
так и голова бы не болела.