The five-minute rule

With his car tuning skills, Atsumu is a legend in the street racing business. There is no race that he and his group do not win.That is, at least, until a mysterious mechanic starts weaving the victories of Osamu's group from his secret workshop.Atsumu will have to put his pride aside (impossible) and infiltrate the strange mechanic's garage, feign ignorance, be his student, and, once he gains his trust, uncover all his secrets to prevent Osamu from beating him again.There is only one problem, though. Actually, two, if you take into account that this mechanic is simply unbearable: no one can enter Sakusa's workshop.