Aru hi, sekai wa kusatteiru to omotta

Tensei, hari o sase, konton no naka de, junnou shite, nijimanai you ni
Tensei, kore wa boku no uta
Tensei, kore wa kimi no uta
Tensei, kore wa bokura no uta

Yoru wa
Hoshizora ga mienai kara, bokura wa yoru ni dekakeyou
Sureta hazu no kokoro ga kurushii no wa, doushite darou ka?

SANE, MAD, SANE, MAD
Kami o koroshi, kami to nasu no ka?

With a lot of thinking my conclusion is this

RARARARA
RARARARA
RARARARA
RARARARA

Aru hi, sekai wa utsukushii to omotta

Hoshizora ga mienai kara, bokura wa hoshi o sagasu n'da ne
Sureta hazu no kokoro ga kurushikutemo, sore de ii
Kanashimi wa kienai kara, bokura wa te o tsunaideiyou
Kimi ga mata, tsurakute, kurushii toki, kikoete kuru sa
Tensei, kore wa boku no uta
Tensei, kore wa kimi no uta