Shina Dark: https://mangadex.org/title/1062/shina-dark-kuroki-tsuki-no-ou-to-souheiki-no-himegimi
Demon King awakens, human kingdoms sends their princesses (among other girls) to him for their own ulterior motives. There is ecchi, action and politics involved. Also lots of comedy. Author balances it quite well so it never becomes too serious or too light. It's a shame it ended after just 4 volumes. According to description these were meant as a prologue.
Sora x Lila: https://mangadex.org/title/15213/sora-x-lila-sorairo-no-lila-to-okubyou-na-boku
MCs girl Sora dies, but alien girl Lila record her mind and reconstructs body to match Sora's. Now they swap minds and take MC for a ride. Standard rom-com, quite fun in my opinion. Being axed actually "resolves" the story and I think this is also one of the pluses for it - it doesn't run forever without any progress.