Well, the conclusion of Youhei arch and might be one of the nicest arch I have watch for a while. So much happen here with so much emotional to the point you got to feel Youhei and Mei. All of this is to get Youhei back to himself which Mei love to see.
The whole scene at the scoccer club where Mei, Nagisa, and Tomoya meet at. You got to see the big tension with the team member there and how much their dislike Youhei . You found out more about this incident when Tomoya talk about it. Kinda sad to see this is the reason they kick him out but make sense based on what you see.
The rig between Tomoya and Youhei is starting to get bigger from one scene in class to the point you think you will see a fight if no one stop them. This tension will reach broiling point later.
Seeing Mei trying her hardness to help her older brother by even begging the team club to let him in is sad to watch. Literally, she and Nagisa, and Tomoya have to become as a ball runner for the club just to please the team member to the point they're literally hitting the ball out to get them to do more work. Worst when one of the ball hit direct to Mei. All of this was nothing when the team club member basically don't want to let Youhei in the club and literally hurting Mei when she cry about this.
From this, you got to see the fight we want to see which is Youhei take down the soccer team member who is hurting his little sister, with the help with Tomoya . This will take us to a very powerful scene where both Tomoya and Youhei fight for this whole incident and where both Nagisa and Mei try to stop them from fighting to the point Mei just stop her brother fighting to confess she is sorry for what happen. Kinda touching scene. You think they hate each other but at the end, they reconciliation and become friend once more.
A very good ending for this arch and in a way help develop more of Youhei who don't have much time to develop as we only know him as a comedic character in the entire show. This side is something which fresh out his development quite a bit which is a good thing.
Also, we got to see the fun ending when he found out his fake girlfriend isn't Nagisa older sister but her mom and seeing his reaction is joke (and also, getting chase by Nagisa dad).