"Ano Toki Tasukete Itadaita Monster Musume desu." Isekai Ossan Kyoushi Totsuzen no Moteki ni Konwaku suru
Author: Unknown
Description
Some 20 years have passed since the protagonist was summoned to another world and retired from the army. He is still single in his 40s and lives as a low-ranking professor, until one day, an elite "monster girl" transfers into his class.
Rating: 7.6
Follows: 80,611
Chapters: 51
