Sudden

Ken Kaneki, a bookworm college student, meets Rize, a girl his own age with whom he shares many interests.

Kim Seo-hui’s life is changed forever when her politician father dies in a car crash and her husband disappears – all in one day. She enters the world of politics and join hands with small-town detective Jo Tae-sik to uncover the truth when she finds out that the car crash might not have been an accident after all.

After an accident, no one can see the once-popular Koichi — except for loner Mitsuru, whose fondness for his classmate blooms into a haunting romance.

All thanks to the special ability that he developed, Yuu was able to cheat his way into a very prestigious high school. With his power, he thought nothing was going to stand in his way, until he met a mysterious girl named Nao Tomori and other students with special abilities just like him. It was the beginning to a new life.

On August 20XX, a gate suddenly appears in Tokyo's Ginza district, unleashing a portal where monsters, medieval knights and other fantasy beings come from another world and wreak havoc on Tokyo. The Japanese Defense Force take action against these monsters and push them back into the "Gate". Third Reconnaissance Team is dispatched to the "Special Region" lead by officer (and otaku) Youji Itami. On their travels, they are joined by a beautiful elf girl who is a survivor from the dragon's rampage and guide the group across the dangerous new world.