Flying Bunny

From Aerandria Scans:
When Aida Minami was little, she fell in love with the long-distance runner Manabe Keiichi. He was in the club that her school teacher mother supervised. But all her hopes were dashed when Manabe confessed to her that he was in love with her mother! Worse yet, he promised to take care of both her mother and her! Talk about instant love defeat! But it seems that the worse is not over yet because after a few years, Minami finds out that Manabe is now a teacher at her high school and the supervisor of the track and field club in which she belongs! Will her heart have a chance this time?
From Baka-Updates:
A love story about Minami Aida and her love interest Manabe Keiichi. Keiichi however has set his eyes on her mother, his former Track and Field Supervisor. During their first meeting Aida fell in love at first sight and suffered an instant defeat when Keiichi called on her and confess his love that he will take good care of Aida and her mom.
Presently Aida is now a High School student and involve in Track and Field where incidently Keiichi is the coach. What will happen to Aida's love? What happened to Keiichi when he confess his love?