Proposal : Update Manga Sefure no Heart no Tsukamikata themes

Proposal details

This proposal will make the following change(s):

Update the themes of the manga Sefure no Heart no Tsukamikata

Change the themes from :
Unknown
to
School

Based on the following reason: Missing

With the source: https://www.anime-planet.com/manga/sefure-no-heart-no-tsukamikata