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...
I think if I told Mullin, 
he'd actually be happy to hear it.
أظنني إذا أخبرت ميولين، سيفرح بسماع ذلك
Mullin würde sich ziemlich freuen,
wenn er das hören würde.
Si se lo digo a Mullin,
seguro se alegraría de saberlo.
Si se lo digo a Mullin,
seguro que se alegraría de saberlo.
Je suis sûr que Mullin serait ravi,
si jamais il apprenait ça.
Se lo dicessi a Mullin, chissà come ne sarebbe contento.
Acho que o Mullin-chan
ficaria feliz se soubesse.
Думаю, если рассказать
Муллину, он будет рад услышать.