Kyoushitsu no sumi ni okisari ni shite kita mirai
Kyoukasho dake motte kimi wa doko e yuku no

Machi e tobidashite miyou yo wasureteta sora no hirosa ni kizuku yo kitto

Rough diamond nemutteru kedo
Kimi no chikara de donna iro ni mo kagayaku
Rough diamond tsumazuki sae mo
Kimi no daiji na ippo nan da yo makenaide

Tsukue no kizu mo itsuka omoide ni kawaru
Houteishiki ja yume wa warikirenai yo

Semai fensu no mukougawa
Suwarikomi hiza wo kakaeteru kimi ga mieru

Rough diamond ima wa mienai
Ashita dakedo kujikenaide shinjite
Rough diamond kaban no naka no
Monosashi ja hakarikirenai yume dakara

D-i-a-m-o-n-d

Rough diamond nemutteru kedo
Kimi no chikara de donna iro ni mo kagayaku
Rough diamond tsumazuki sae mo
Kimi no daiji na ippo nan da yo makenaide
Rough diamond nemutteru kedo
Kimi no chikara de donna iro ni mo kagayaku
Rough diamond daremo ga minna
Motte iru tatta hitotsu no yuuki da yo