Help datte koi shitara… (When I’m in love) (martina's N-EX Image Song) (Tomoko Ishimura & Yuki Matsuura)

[nihongolearn__]

is there any way to know who sings which parts... does anyone know, at all?
i kinda know what parts are both of them, but i need confirmation.... please!?

 

[nihongolearn__]

https://www.lost-slayers.net/multimedia/letras/dattekoi.php