A Woman of Few Words

I detect the subtle presence of a succubus...

The FMC is a mysterious woman (page 5, panels 4-5) with a voracious,
insatiable appetite for cum, as if she intends to suck the very life out of
the MC. When sex leaves him strangely dazed and insensible, she says,
"From now on, I'll completely dominate your mind," which suggests the
MC has become her helpless sexual thrall.

It's all very subtle, and extremely well done. Pennel is a hentai genius.

EDIT:
Each time I re-read this chapter, it becomes more obvious that there's
something slightly eerie about the FMC and the way she interacts with
the MC, as he gradually falls under her spell.

It's true that the FMC is never explicitly identified
as a succubus, but there's just enough ambiguity
in the story to leave room for speculation.

This is not the first time we've seen a chapter in which the mangaka
merely hints that a girl might be a succubus. See Kameyoshi Ichiko's
Awareness, which is less ambiguous than A Woman of Few Words.

I tip my hat to a fellow connoisseur.