Ren and Lala have been friends since childhood. Lala would occasionally force Ren to test out her inventions and make him where dresses, but despite all this, he didn't seem to mind in the end because was deeply in love with her (but Run grew angry at Lala). Lala agreed to marry Ren if he proves that he has become a real man, although she doesn't remember this because of her lack of attention, but Ren still tries anyway to win her over.