Proposal : Update Manga A Returner's Magic Should Be Special themes

Proposal details

This proposal will make the following change(s):

Update the themes of the manga Gwihwanjaui Mabeobeun Teukbyeolhaeya Hamnida

Change the themes from :
Unknown
to
Conspiracy, Demons, Ensemble Cast, Historical, Magic, Reincarnation, School, Time Travel

Based on the following reason: Missing