Hello, Today's pick is the Shounen Fantasy manga "Watashi no Kyuuseishu-sama" about Shinya a mediocre High School student that one day has an encounter that completely changes his life. He his told by Haruna a Biutiful Girl that Shinya his her world Messiah the chosen one that to save her world.
Following Haruna to her world, Shinya starts his road to be worthy of this Girl dedication to him.

Description:

Shinya doesn't get stellar grades, he's not athletic, he's a coward, he's a wimp...he's a general good-for-nothing. One day, he meets Haruna, a girl that could change his life forever. Haruna tells Shinya he is the Messiah. The Lord chosen to save her world and that she is his shield.
Could it be true? Could Shinya's life of ineptitude be balance for this one grand cause? Is he really the Messiah? If he is, can he save himself, let alone an entire world?