Fukujuu no Amai Kuchizuke

Sasha is a female drag racer. One day, her teammate, Rafael, crashes his car after she refused his marriage proposal the night before. The circumstances bewilder Sasha. When Marco, Rafael’s older brother and owner of the team, comes to fire her, Sasha’s desperate plea convinces him to give her another chance. However, the condition is that she must win the next race. Sasha is determined to further her racing career. But as she trains, she soon finds herself to be the target of Marco’s passionate gaze! Source: Harlequin