

Summer Wars

Teenage math whiz Kenji Koiso agrees to take a summer job at the Nagano hometown of his crush, Natsuki. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of their matriarch. His job: pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with Earth.
I loved this so much. It felt like going back to your grandmother's (Nani) home. So many people, daughters, sons, their spouses, their daughters and sons. Multiple generations under the same roof. I seriously think so many masterpieces fail due to the emptiness and the sheer lack of character and world development. Here the creator developed a whole family but also a whole virtual world. Amazing work. Underrated masterpiece. Nothing was overdone. Didn't try to convert it into a fantasy game kind of anime. Made me cry multiple times. Made me root for the characters.