Voted for Spring Break because of the event girls' attire.

Even though to my regret I half-assed that event and didn't get any of the event drops. ..・ヾ(。＞＜)シ
Runner-up would be the Valentine event.. <3 Val Abraël.

Would be great if there was any way to reacquire missed drops in the future re-occurring, maybe in the form as additional drops to new event girls; Idk.