Secret, Prized, Treasured Albums

(Comes at max level)

Valentine's Return Gift from Edward Teach.
Increase Rider Coin Choco drops by 2.
[Revival: Valentine's Event 2018 Lite Only]

Valentine's return gift from Blackbeard.

If you open any of them, you'll probably die.
Your instincts as a Master shout that warning, so you can't quite make yourself look at the contents.

It's useless to ask Blackbeard.
His memory's been wiped by an A-ranked skill.
Physically.