"Toki wo kizamu Uta(時を刻む唄)"(A song to pass the time) from "Clannad" sung by Lia.
 
"Negai ga kanau Basho(願いが叶う場所)"(The place where Wishes come true) from "Clannad" sung by Lia.
  original sound track version -> https://www.youtube.com/watch?v=p4kTBtDxYSg
 
"Chiisana Te no Hira(小さな手のひら)"(The palm of a small hand) from "Clannad" sung by riya.
 last scene from Clannad after story ep.22 -> https://www.youtube.com/watch?v=Tv2DXMZFDug
   *** Shizen-en(自然苑), Mutsu-Yokohama(陸奥横浜), Aomori district(青森県) ***
supplement
"Kage futatsu(影二つ)"(Two shadows) from "Clannad" coomposed by Magome Togoshi(戸越まごめ), sung by riya.
 original sound track version -> https://www.youtube.com/watch?v=taGRuyC9-SQ