The Beppu Brothers declare outright to the Defense Club that they're the ones who have been sending the monsters, but the Defense Club members just brush them off, spending their days in their usual slow pace while ignoring the brothers for two whole months. The Beppu Brothers, enraged over this slight, choose February 14th as the day they will have their revenge. And so the Valentine's Day grudge match begins!
which produce feelings of happiness 
and stimulate the mind.
und zur gleichen Zeit wie
das Gehirn aktiviert wird,
que inducen a la felicidad.
que producen sentimientos de felicidad.
ce qui excite le cerveau.
che produce una sensazione di felicità
e stimola la mente
que produzem a sensação 
 de felicidade e estimulam a mente.