Zetsubou Danshi to Chuugoku Musume - Vol. 1 Ch. 2

[MangaDex]

 

[Randomizer]

What? Go out and excercise? My whole life I spent at my home and look at me! 200 cm!
And I've got a curved spine thanks to being a lazy ass

 

[Baqly]

that's genetics
you can become taller if you exercise in your youth