2 titles, most popular first
Yeon Si-eun is a top student who cares only about his grades and is far from strong, yet he refuses to give in to the classroom bullies led by Jeon Yeong-bin. Using quick thinking and whatever is at hand, he fights back, and he finds unexpected allies in tough fighter Ahn Su-ho and troubled Oh Beom-seok.
Mysterious sphere-shaped creatures fill the sky above Earth, and the senior class at Sungjin High School is drafted to fight them. Promised extra credit toward their university entrance exams, the students learn to handle guns and stay alive under Lieutenant Lee Chun-ho, their platoon commander.
