I'm Terribly Sorry, But The 1st Adventure Log Seems to Have Disappeared
Makotoni Zannen desu ga Bouken no Sho wa Kiete Shimaimashita.
An energy drain manga where young boys are cumsucked silly by low level succubus.
(Source: DL Site)
Originally released as a doujin. Night Comics has been publishing the ebook version since 2019.
