Talk:Dead Heat Summer Race!/@comment-60.53.47.22-20170817010201/@comment-31096423-20170817030142

If you really need those hearts, you can always farm the following free quests, they aren't super common, but they do drop every once in a while:

Shinjuku: Demon's Garden (1 Demon only).

Caster's Training Ground (30AP and 40 AP), on every Friday. The Demon doesn't have a high appearence rate though, still, the drop rate is higher here than on the Shinjuku quest.