Died at the Age of 37 and Reincarnated into a Junior High School Student?

One afternoon, while playing a game, I opened the door because someone was talking outside, thinking it was a courier. As a result, I was assassinated by a group of people and fell to the entrance. After I became unconscious, I discovered that I was not dead, but was reincarnated into a contemporary junior high school student named Eguchi Suzuki... How will I find out the reason and start my new life? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.