Love Dester

A group of 140 students is taken to an Experimental Town by a figure known as 1st, who identifies himself as their "tester." He forces the students to express genuine love as part of his experiment. If a student confesses their love and it is returned, they are allowed to leave. If not, they face death. The story was initially published digitally on Shounen Jump+ and only the first three volumes were released in physical form, with subsequent releases available exclusively online.