Manga by Blue Lock Author, unrelated to Blue Lock series.

A high school student, Jo, dreams of a normal life with Katase, who he has feelings for. But he had another face. Following orders from a mysterious classmate, Mizuno, Jo approaches a man who seems to be the culprit behind a series of disappearances of high school girls. What is the true identity of that man? And what is the special ability that the castle has?