Everything Begins with Numbers

(Comes at max level)

Valentine's Return Gift from Charles Babbage.
Increase Caster Coin Choco drops by 2.
[Revival: Valentine's Event 2018 Lite Only]

Valentine's return gift from Babbage.

Numerous mathematics texts are stacked on top of each other. Every book read is like a step up a staircase. Reading them expands your knowledge, and you are sure to climb the staircase they form.

Let us see the world from the same perspective one day...
That may be what he is trying to say.