If you liked
Tsuyokute New Saga
|
...then you might like
Arifureta Shokugyou de Sekai Saikyou
|
Not so much a similar premise as a similar mood. Both seem somewhat cute and uplifting before delving into brief moments of grim darkness. Both MC's are rather knowledgeable, and use this knowledge as their main strength rather than physical capabilities, although both are more than capable as fighters.