Boku wa Uchuujin ni Koi o Shita.
Girl is an adorable space cadet, but not in a cliche way. She is passionate about what she loves and it's lovely. I also like that the guy isn't a total ass to her. They have lots of potential.
Liberty Liberty!
Honestly my favorite by this author. No pushing, questionable consent sex and a relationship pace that makes some sense. I wish the story went longer, so you could see them grow even more, but overall it's a sweet romance with just the right dash of angst and drama.
Yuusha In Maou N Chi
Super cute romance between an outcast, bumbling, overly strong hero and a powerful (and probably lonely, misunderstood) Demon King. Clearly a couple that fits each other perfectly. I love how the hero acts towards demons, as well as his inability to read! Signs mean nothing!
Koi wa Ina Mono Myouna Mono
A rare yaoi manga where the seme, despite wanting the uke terribly, actually acknowledges forced sex = rape = bad, and continues to ask for consent. The actual premise is funny, with the uke receiving dreams of the future and seeing himself with this guy and refusing to accept it. I loved the two families and the glimpse into the future. If you actually want to see their first time together, it's ch 7 in Aruji No Oose No Mama Ni. Overall, if you don't mind super tsundere ukes and like fated lovers and devoted semes, this is a great manga.
Ibitsu na Koi no Seesaw Game