Complex sentence: Though this is Oishi's move, Eiji uses this to both help Momoshiro and himself to both mature and gain the flow of the match during the game against Hyotei Gakuen Doubles 2, though he didn't hit it at the last line as Oishi did.
Split into simpler sentences: Though this is Oishi's move, Eiji uses this to both help Momoshiro and himself to both mature and gain the flow of the match during the game against Hyotei Gakuen Doubles 2. Though he didn't hit it at the last line as Oishi did.