Steins;Gate

Set in Akihabara, Tokyo, the story follows self-proclaimed mad scientist Rintaro Okabe, who runs the "Future Gadget Laboratory" along with his childhood friend Mayuri Shiina and the nervous hacker Itaru "Daru" Hashida. Their lives change forever when they invent the "Phone Microwave," a makeshift device capable of sending text messages into the past. This accidental breakthrough attracts the attention of a shadowy organization known as SERN, which has been conducting its own dangerous time-travel experiments. As Okabe and his newfound genius neuroscientist ally, Kurisu Makise, begin altering the past through "D-mails" and eventually mental time-travel, they quickly realize that every change has devastating, unforeseen consequences. Plunged into a harrowing alternate reality, Okabe must repeatedly leap through time to prevent the tragic deaths of his loved ones and stop a dystopian future, suffering immense psychological trauma as he watches his friends die over and over again.