To be checked later isekai/fantasy/adventure [TO BE DELETED]

Ecchi, Harem
https://www.mangaupdates.com/series/k2url31/ochikobore-datta-ani-ga-jitsu-wa-saikyou-shijou-saikyou-no-yuusha-wa-tenseishi-gakuen-de-mujikaku-ni-musou-suru

Harem but romantic subplot so.. not sure yet

https://www.novelupdates.com/series/overlimit-skill-holder/

ecchi -.-
https://www.novelupdates.com/series/isekai-cheat-survival-meshi-wn/

harem, love triangle

source:
https://www.novelupdates.com/series/ryuu-kusari-no-ori-kokoro-no-uchi-no-kokoro/

NTR, harem

source:
https://www.novelupdates.com/series/a-warrior-exiled-by-the-hero-and-his-lover/

harem, polygamy & shoujo-ai

source:
https://www.novelupdates.com/series/a-sword-master-childhood-friend-power-harassed-me-harshly-so-i-broke-off-our-relationship-and-make-a-fresh-start-at-the-frontier-as-a-magic-swordsman/

harem but not sure, comment says light read

source:
https://www.novelupdates.com/series/reincarnating-into-a-different-world-aint-this/

Ecchi -
according to mangaupdates