Hehe, ah yes, ai no chikara!

jelenity: Basically, later in the episode, two 
characters make a contest out of who can pick the 
most sweet potatoes, one (Ruka) relying on the 
power of science, and Eros relying on the power 
of love (he's picking the sweet potatoes for the 
person he loves, in order to give them a sweet 
treat ^^). Eros wins ^^

-Misha