Welcome to the NHK (Nihon Hikikomori Kyoukai).
A story about Satou, a 22 year old guy with psychological issues, his struggles, personal development, and his interactions with the people around him. This is a slice of life/comedy/drama/slight romance show. Has pretty good music all throughout.
Thanks for the recommendation! I've watched the anime and it's one of the very few Japanese anime that I liked (I usually don't watch japanese animation, I find it boring and all the same). I found the story really attractive and I enjoyed every episode. Thank you!