Osananajimi-tachi ga Ninki Idol ni Natta: Amaama na Kanojo-tachi wa Ore ni Mitsuide Kureteiru

Kazuma Kuzuhara, a high school boy, doesn't have to do any work because his childhood friends — idols Yukina and Arisa — shower him with money and gifts. But gradually, their overwhelming love begins to turn into madness…? A dark romantic comedy about living off others’ generosity!

(Source: Comic Growl, translated)