Isaku works up the nerve to confess her feelings to Keiya, and not only is Keiya's response upsetting, but he also almost kisses another girl at school the next day. Isaku's friends try to give him advice on how to rectify his mistakes.
No wonder she doubts your feelings.
لهذا شكّكتْ بمشاعرك
Das wirft Zweifel auf
die Ehrlichkeit deiner Gefühle.
Ci credo che poi 
ha iniziato a dubitare dei tuoi sentimenti.
Não é à toa que ela esteja
duvidando dos seus sentimentos.
Понятно, почему она
усомнилась в твоих чувствах.