aitai toki wa dō suru? tsubasa ga arebaii noni
kimi ni aitai toki wa dō suru?
himitsu no tobira o knock - knock!
ii desho?

tōi futari no kyori ga
setsunakute egao ni narenai
sonna watashi no koto mo wakatte yo
sabishikutte chotto okocchau

suki ni natte hontōni yokattato
mainichi sasayakitai motto ne!

aitai toki wa dō suru? tsuki ni hoshi ni negau dake?
kimi ni aitai toki wa dō suru?
monotarinai no yume ja
aitai toki wa dō suru? tsubasa ga arebaii noni
kimi ni aitai toki wa dō suru ?
himitsu no tobira o knock - knock!
ii desho?

kimi ga watashi no naka de
sukoshi zutsu ōkiku natteta no ne
itsumo issho janakyato
negau no wa tōzen deshotte yappa omocchau

dare no sei? setsuna sugiru mune
yasashiku dakishimete yo motto yo!

iitai koto ga arukedo koko ni inai no dōshite?
kimi ni iitai koto ga arukara
hitori bocchi wa iya yo
iitai koto ga arukedo heya ni dare mo inai no ne
kimi ni iitai koto ga arukara
himitsu no tobira de knock - knock!
kite yo ne!

suki ni natte hontōni yokattato
mainichi sasayakitai motto ne!

aitai toki wa dō suru? tsuki ni hoshi ni negau dake?
kimi ni aitai toki wa dō suru?
himitsu no tobira de knock - knock!
kite yo ne!
aitai toki wa dō suru? tsubasa ga arebaii noni
kimi ni aitai toki wa dō suru?
himitsu no tobira o knock - knock!
ii desho?