Sekai Saikyou no Doryokuka: Sainou ga (Doryoku) Datta no de Kouritsu Yoku Kikakugai no Doryoku o Shitemiru - Vol. 4 Ch. 18 - Promise

[MangaDex]

 

[Elhao]

Oof, the translation was bad at some points before, but it really went down the shitter with this chapter.

 

[SSRBReader]

Nice flashback—would’ve been even better if the translations were good too.

 

[HelioCesar]

Oh so it's a story about a really old man and young girl falling in love!
/s