Agreeing to go somewhere else with 賛成

Kanji Explanation: Becoming and accomplishing with 成

After moving and transferring schools, Lulu has finally made some friends in class. Following some after-school shopping, they stop by the group’s favorite café, only to find it filled to the brim with hoodlums.

響子(きょうこ):: 「残念(ざんねん)だけど　他(ほか)　行(い)きましょう」; “Too bad... let's just go somewhere else.”; Literal: “It's too bad, but let's go somewhere else.”
清美(きよみ):: 「賛成(さんせい)」; “Agreed.”; Literal: “Agreement.”
美代子(みよこ):: 「そうしましょう」; “Yeah, let's do that.”; Literal: “Let's do that.”

Key Points

1賛成(さんせい) works as a standalone I agree

By itself, 賛成(さんせい) means approval or agreement with the suggestion that was just made.
In dialogue like this, it is a brisk natural way to say “Agreed” or “Sounds good”.

Vocabulary

賛成 (Agreement)

賛成(さんせい) expresses that you recognize someone else’s opinion or action as good and agree with it.

残念 (Regret)

残念(ざんねん) means regret, disappointment, or feeling that something fell short. The idea is that an unsatisfied thought remains in the mind.