Miss Succubus & Tasty Treats

The genderbend tag would be appropriate here, but for reasons shown in a comic currently not on Fakku.

*Spoilers for the relevant works ahead, obviously.*

The succubus here appears to be Lenis Lubelton, who makes a brief appearance as the male hero shown at the end of A Hero's Rejoiceful Tale of Loss to the Devil and Life as a Succubus. In the sequel to that comic (which isn't on Fakku at the moment), Alma quickly butchers his companions before turning him into the succubus we see here.

Notwithstanding (IMHO) the rather excessive size of her "huge tracts o' land", seems Succubus-san has taken a liking to MC's "flavor" (if-you-know-what-I-mean).

And chances are she's older than MC, so she could qualify also as a Sexy Onee-san.

MC lucked out that she liked him now little bro gotta work on his endurance!