Part A
The sweater that Beelzebub had gotten from Mullin that she liked so much starts to come undone. Beelzebub is in so much shock that she keeps sighing and trying to avoid eye contact with Mullin. Mullin misunderstands and feels like he made her upset again somehow...
Part B
Beelzebub have a flower viewing party now that spring is here. Beelzebub says that she’s never being to a flower viewing party, so the others go all out for her. Since the day is so chill, Mullin happens to remember when he first became Beelzebub’s attendant...
but I couldn't figure out why 
Her Highness was so down.
لكن لم أكتشف لماذا سموّها كانت حزينة
aber mir fällt nichts ein, weshalb
Ihre Exzellenz so enttäuscht sein sollte.
pero no sé por qué
estaría tan deprimida.
pero no sé por qué estaría tan depre.
mais son attitude
reste un mystère.
ma non sono proprio riuscito a capire 
come mai Sua Altezza fosse così abbattuta.
não descobri qual a razão
para ela estar para baixo...
но так и не понял, что могло
расстроить Её высочество.