Shuichi sealing out the remaining aliens alone on his own, but forgetting Claire would gladly help dealing with it was kinda dumb, because if he didn't manage to do it they all would be surprised by a sudden comeback of undefeatable force that still dwell within him refusing to vanish.
I strongly disagree with how Ikeuchi whole arc was treated by most people, he was betrayed and left out, abandoned by whole Sayaka party, growing heartbroken after he seen Shuichi with Chihiro intimate moment.
Ikeuchi had plenty of moments in the story where we knew he will have inevitable comeback and will bite them in the ass.
Elana end was sealed when she chosen to erase Shuichi memories of her, sure he got some memories of her relationship with him through Chihiro help, but already formed feelings for Claire so things would be awkward and in the end she sacrificed herself for their future together.
The deal with the Aliens was nicely played out, bit of a cliche, but obviously everyone would jump in on the delicious alien tech.
I see that Kasukabe has became a magical girl idol... but... aren't those guys with cameras looking for pantsu photos?!?
Claire and Shuichi involvement in the final battle was played out on giant screens all over the world by Ikeuchi, something he always wish for was a nice goodbye for him and made them heroes.
Despite their betrayal, he actually helped them out in the end... honestly, they didn't deserved it as they didn't really acknowledge how they treated him.
Most importantly, Shuichi finally was the one who
entered Claire and it was even a make up seggs.
Noice.
That was a nice story, bit too much lewd that got distasteful and boring, what's worse was Claire leaving Nana along with Kasukabe to being raped by Sayaka as an excuse for her "special contract" deal, which was played out for laughs... I mean, c'mon...
9/10