Recommend me some pls

(robot, its more slice of life than sci fi) http://www.mangago.zone/read-manga/i_m/
(robot, drama and smut, not very sci fi either) http://www.mangago.zone/read-manga/monokuro_limit/
(pure smut, sex robot owo) http://www.mangago.zone/read-manga/hot_and_cold/
(bigggg age gap, robot, romance not very sci fi) http://www.mangago.zone/read-manga/suki_ni_nacchau_yo/
(alien, age progression, romance not rlly sci fi) http://www.mangago.zone/read-manga/uchuu_de_ichiban_kimi_ga_suki/
(robot, tragedy, childhood friends) http://www.mangago.zone/read-manga/machina_angelus/
(this one is just starting but already seems interesting) http://www.mangago.zone/recommend-manga/stack_overflow/

Noi!

I wasn't expecting the fourth one to have that BIG age gap

it's not what u asked but, there is a tv series called Resident Alien. It's mainly comedy but I think it has a romance subplot. there was a kiss scene with the alien in yesterday's episode too. It's kinda funny how the timing of the kiss lines up with this webtoon's kiss.

Thanks for your recommendations! I'll go give them a read~ (o≧∇≦)o