https://www.mangago.me/read-manga/the_friendly_winter/
https://www.mangago.me/read-manga/kimi_no_sekai_ni_koi_wanai/
https://www.mangago.me/read-manga/game_x_rush/
https://www.mangago.me/read-manga/the_walking_cat_a_cats_eye_view_of_the_zombie_apocalypse/
This one I guess can be read as a bromance or a romance, I’ll leave it here:
https://www.mangago.me/read-manga/shuuten_unknown/
https://www.mangago.me/read-manga/shuuten_unknown_gaiden/

Friendship, parental, brotherly, you name it. As long as romance isn't the main theme, thank you!