Cute fluffy sweet wholesome almost no drama and some humour next door neighbour stoic older guy babysat younger guy who feel in love when young and keeps saying he wants to marry him main story is once older the happy go lucky extremely positive sunshine younger guy still confessing to stoic older guy pursuing him cooking for him at his house gets artist job at older guys small gaming company and persistently pursues him bounces back from minor setbacks and older guy being tsundere as older guy starts to finally get blushy flustered does keep rejecting him including harshly one time but younger guy bounces back doesn’t let it dishearten him and they both still take care of each other regardless and younger decides to try to get over him because feels like he’s being burden when older doesn’t return feelings and older guy conflicted realises he misses him and eventually rethinks relationship return feeling and fumbling awkward gestures attempts to communicate lol eventually manages to confess back with help of overly supportive coworkers , both the characters are cute no toxicity, older guy also secretly loves cats and they end up finding adorable stray black kitten that he can’t resist adopting ahh also secretly like other cute things and sweets etc big softie, minor side characters coworkers are nice too and some gaming design work story, short sweet fluff story
Why not, CEO?!