Mermaid Princess and Shell Bra - S1.E18

Nako has always been worried about her personality, which falters outside of her home. As Nako gets a larger bonus on payday, she becomes worried that she needs to change in order to deserve that amount. Later that day, she, Ohana, Minko and Yuina go shopping, where she ends up splashing out in the hopes of changing, though doesn't feel she has at the end of the day. The next day, Nako decides to go to work with the same attitude she has at home, but it ends up backfiring against her. When she asks Sui about why she got a high bonus, she explains it was as thanks from a customer who followed her advice, praising her for the personality she has at Kissuiso, which cheers Nako up.