Sea and Sky

Self-Insert. When I get hit by a bus, a mysteries entity called the Gatekeeper saves my life, at the cost of sending me to an another reality. Now, I must join a war against the Abyssal enemy, a war mankind is not winning. However, armed with the soul of a Mars-class Battlecruiser, I may stand in a unique position to turn the tide. No Kantai Collection Knowledge required.