Suki, Kamo.
World's End no Niwa
But moves away from home to apt. Meets a neighbor who lives in a house next to the apts. And that neighbor has a nice garden and the guy is like I love it, so goes to help out at the garden. Pretty sure he's down for the ojisan.
Koi To Kedama To Otonari-san
Bright Light Sprout
I really like this mangaka, so I'll probably like this a lot. Sooo guy moves into an apartment, HS kid lives next door alone which piques his interest. Edit 03.31.2017: i feel hella played right now. *adds tragedy tag*
Window to Window
K so guy has been in love with his childhood friend since mid school, they are at uni now and live next door to each other. Anywho one day the guy is playing with his bum and the curtains blow with the wind and the friend is right there sipping tea looking out his window and sees. And the next day was playing it coo, bit the guy with who's name were you calling while playing with your ass tho. Edit 03/11: omggggggg the backstorryyy thoooo red head liked yubin firsr, but his mom was like no men can't marry each other and bitch ripped up his drawing omgggggggggg mi corazon!!!
Mijika na Koi Dato Omou Kedo