Springtime for Hitters!

nspired by a Japanese fairytale of the Red and Blue Oni, Keroro devices a plan to win over Natsumi. Playing the Blue Oni, a bad guy who was only doing so to bring happiness to his friends, he tries to force a romantic situation between her and Giroro. However, nothing goes to plan and the special romantic moment is shared by the Red and Green Alien instead.
Deciding that it is better to be the Red Oni, Keroro is quickly pelted with soybean by Natsumi on Setsubun. Wanting revenge, he has Kururu turn her into an Oni girl via the Oni ray gun. Now all soybean products are attacking Oni Natsumi and not even Giroro can save her. Being cornered, Natsumi almost yields to Keroro until Fuyuki reveals that Natsumi is a Thunder God.