I'm trying to remember the name of a novel series i read 40ish chapters of 4 years ago. Its an isekai story where the mc's childhood friend is going to another world and he goes with her(not summoned they have a gate). The girl's mom sends them off, i think she gave the mc a phone or some other device. The girl herself is insanely devouted to the mc and wants him to be more or less worshipped along with gathering girls for his harem. The mc is cluess to this. The first major arc takes place in a nobles massion, and the noble is developing a substance that takes control of people. In that arc the girl goes with the maids to cook amd scares them when she brutally cuts a chickens head off (not important but distinct). One of the girls gets her body modified by childhood friend. Thats basically all I remember any help would be appreciated. Btw if i messed up with this post somehow I apologize this is my first time on the forums.