Erased
Plot: A guy named Satoru goes back in time (referred as revivals) to avert the domino effect in the murder of his classmates. Trouble seems to follow.
Link to OST playlist on YouTube
End Credit song: 🎵Kanojo in the Display "Akane"🎵
Season One
Episode 11
Episode 12
Season 2 is not necessary as this show has a proper conclusion. It is based on a manga that later got adapted to an anime and even a film! Wowza. So check those adaptations out when you get a chance.