Babel

On the morning of New Year's Day, Kota, a rookie hotelier working at the luxurious "Babel" hotel in the city, sees the world collapse. Kota, who has lost everything he loves and is in despair, is given a mission. Find the terrorists hiding in "Babel" and avoid the tragedy of New Year's Day. The world has been turned back in time a week before, to Christmas Eve. With so many conflicting agendas, will Kota be able to fulfill his mission in the seven days he has been given? The fate of the world hangs on Kota's choice.

(Source: Heros Web, translated)