Hehe, so it appears that with this anime, it is opposite to Morita-san when it comes to openings and endings.
Morita-san had an opening but no ending. This anime has no opening but an ending
Poor Atsumi XD She always tried her best to grow but it never worked out for her
In the end, she still took the milk, maybe she still has confidence that she can grow
As for Atsushi, I never thought I would see someone who is suppose to look like an adult spring into action as soon as his sister arrives XD The way he just yanked her off the ground to play video games
The ending was nice though with them holding hands