Finishing clubhouse insulation with 完成

Kanji Explanation: Becoming and accomplishing with 成

Planning for winter temperature drops, Yui and her friends use cardboard and masking tape to cover all the openings in their clubhouse. The final step is to close the door and see how it works.

友達(ともだち):: 「よし結衣(ゆい)が入(はい)ったら完成(かんせい)だ　入(はい)って！」; “Yui, once you're in, it's complete. Get in!”; Literal: “All right, when Yui gets in, it's complete. Get in!”
結衣(ゆい):: 「うんっ」; “Right!”

Key Points

1完成(かんせい) means the project is complete

完成(かんせい) focuses on the finished state after all the work is done.

2The line has a final-step excitement to it

よし signals that they are ready for the decisive last move.
The imperative 入(はい)って！ shows they are eager to test whether their plan worked.