Mou Kimi o Matanai

Takashi and Chizuka's relatioinship seems to be sailing smoothly, then suddenly Naruse, Takashi's ex and Tsutsumi's cousin, shows up at the same time as Chizuka's first love. It's a battle to control their jealousy as their exes seek to take back their previous lovers. Will they keep their relationship afloat or will they fall apart?