Carry My Fire On Your Water

Haruka Nanese was at swim practice when he and Rin get into an argument. Haru falls into the pool, and in doing so, finds a mysterious portal at the bottom of the pool. He falls through into a different world; a lush forest surrounds him. Someone seems to have saved him, but who is he? Read find out. Modern styles may be used (GUY x GUY).