Good day guys, I have been trying to find this novel that has given me sleepless nights for quite sometime now. The novel is about 3 students got summoned to another world to defeat the demon lord/king? 1 student agreed the girl who has a massive crush on the same guy also agreed. But the bestfriend did not agree and he asked to be sent back from his original work. The MC is a badass mage but hides his power. So guys anyone knows the title of this novel? I appreciate the help. Thanks.