(given sentence) I barely finished my homework after he returns to my house. Here's the link that shows where this question is from. http://www.ggulpass.com/2017/05/2015-9_80.html This sentence is from choice #4 of question #10
According to the correct answer to the question, they say we need to change the tense of the verb 'returns' to returned because the tense of the verb 'finished' is PAST. But in my opinion, I think the verb 'returns' needs to be like 'had returned' because the event of his returning to the house had happened before another event, which was finishing the homework. I think that makes more sense in that way.
What am I missing here?