I am not a Succubus! by Horitomo — Ongoing

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Volume 1
Chapter 1 released Jul 2 '17
Chapter 2 released Aug 1 '18 NSFW
Chapter 3 released Nov 16 '19 Age gap NSFW
Chapter 4: Lamia After the Rain released Dec 1 '19
Vol 1 extra: Finally Tomorrow released Dec 1 '19