The Paladin, The Student, And The Space - Time Guardian

The Paladin, The Student, And The Space - Time Guardian,

Elliot was the Paladin, the strongest warrior of Raha-Adrah. He fought the Demon King, Raoth, and yet before Raoth died, he was cursed, banished from his world, sent to the far-away Earth, Monday, August 22, 2018.
Louise is a normal College student living in her own apartment due to her parents being abroad. Being sick, she did not go to class on Monday, August 22, 2018.
Sean was the best in his agency. He stopped countless invaders from different worlds and time periods, and now he was tasked of handling a ridiculous foreigner who seem to have omnipotent abilities, destination: Monday, August 22, 2018.
Due to some accident, they ended up in the same time-axis, and, funnily enough, they ended up in one space-axis: Louise's Room.