This should be just about right. If not entirely correct, at least all the way in tune.

C              Am/C
Crying, shiku shiku
    Dm               Bm/D&#8232;
Reluctantly, shibu shibu&#8232;
     Em7            Am
Repeatedly, tabi tabi&#8232;
          Dm        G
Just in time, giri giri
        C               Am&#8232;
Hara hara, nervous heartbeat&#8232;
   F                     G
Kira kira, glittering sparkle&#8232;
     C                                            E
Chika chika, the flickering light of the stars&#8232;
       Am                                         G
Doki doki, the hammering beat of my heart&#8232;

Intro/strings

I'm messed up, mecha mecha&#8232;
But you laugh, gera gera&#8232;
In the lightning, goro goro&#8232;
And your eyes, pika pika&#8232;
Kisu kisu by the river&#8232;
Gusha gusha, that flows so slow&#8232;
Zaa zaa, in the sound of the pouring rain&#8232;
Chiku chiku, when will I see you again?