Complex sentence: While this happens Hideo, Hiro and Hikari love triangle becomes evident and the two baseball players start growing apart and even though Hiro has feelings for Haruka he starts making his decisions to win Hikari's heart.
Split into simpler sentences: While this happens the love triangle between Hideo, Hiro, and Hikari becomes evident and the two baseball players start growing apart. Even though Hiro has feelings for Haruka, he declares his intention to win Hikari's heart.