But isn't Yukari technically stealing from herself
Not really, Ran won't let Yukari take money to go out drinking, so she tricks Ran into giving her money. Though phrase number 4 is a dead giveaway.
2. The internal structure is revealed1. The Beckoning Chen piggy bank is completed--a gap?!When you put in money, you hear a random phrase.
Examples:
1. "Ran-shama"
2. "I love you so much, Ran-shama"
3. "I'm sorry, Ran-shama"
4. "Sake bought using someone else's money is the best~"We're geniuses *cheering* Slurred3. We go out into the nighttime city!