Ecstasy Hearts

 was a Romance Webtoon Original created by SilentMaru; it concluded on August 2, 2018.

Synopsis
''Shimizu Anya is the daughter of the two former top Tennis Players of the world. And now, it's her time to conquer the domain of Professional Tennis at least until her destined rival came and completely crushed her before she could even break out of her bubble. This is where her one-sided rivalry begins.''

Related

 * KILLMAX: Same illustrator (SilentMaru)