... it's just that it has a Lucky Charms Title that couldn't be represented by TV Tropes:
- Mahoutsukai (♂) to Deshi (♀) no Futekisetsu na Kankei at Myanimelist.net
- Mahoutsukai to Teishi no Futekisetsu na Kankei at Baka Updates Manga
- Mahoutsukai (♂) to Deshi (♀) no Futekisetsu na Kankei at Kitsu.io
I did a search on the name of one of the characters instead of the title, and got these and a few more.