
There is also plastic surgery to make someone taller. lol

http://www.mangago.zone/read-manga/the_next_door_neighbor/uu/the_next_door_neighbor-chapter-7/9/ - He always was tall but being overweight can surely create the appearance of not being as tall, he just did some plastic surgery and liposuction maybe ╮( ̄▽ ̄)╭

Oh! I've seen that panel when I revisited previous chapters just cuz I wanted a comparison but I was not pleased cuz I was looking for one where the past him was standing next to another character, but no luck! So, here I am, just unsatisfyingly accepting that he's really just a tall man from the beginningXXD
I don't really care about the plastic surgery. I just wanna know... how did he became so tall in the span of two years? He's past puberty from the beginning, ain't he? He's even a head taller compared to other male characters on this manhwa. That's my only sentiment