You're thinking too much, and if I get you right your head is in the gutter lol =) Going with the theme of these Nyoron~ strips he is just being mean.
Yuaki~nYuaki~n...What?It's Valentine's day, so here's chocolate for you.Ran, Ran, is dinner ready yet?It'd help me more if you gave some stove fuel.Rinnosuke-san,
Rinnosuke-sanYou ate it yesterday, didn't you.