CAWD-411 "I guess you missed the last train... I'll let you stay over because we're in the same batch."
In this sentence, "終電逃しちゃったね" is translated to "I guess you missed the last train," and "同期のよしみで泊めてあげる" is translated to "I'll let you stay over because we're in the same batch." The sentence has been rephrased for clarity and flow.