I keep on thinking Drifters are common in this world and the old folks are all a bunch of good 'ol chums in on it to get the Drifters on their good side. The harem isekaiee realizes this and thus is depressed, knowing that his harem is entirely due to the machinations of the Cabal as a way of placating him indefinitely. In his attempt to revengeanance against the system, he decided to one-up the Cabal by borrowing from experiences of his own days as a shut-in, gifting MC with godlike items in the hopes MC does not become dependent upon the Cabal like he did. Upon returning, he will realize what a blunder he made, as the MC has acquired not four but FIVE haremettes due to winning an impossible gamble he overcame only with the harem hero's aid. Distraught at how the Cabal seems to anticipate his every move, harem hero will become DARKNESSHERO.