Re:Re:

Re:Re: is a song performed by Japanese Rock Band Asian Kung-Fu Generation from the album Sol-fa, released on October 20, 2004. In 2016, the song was rerecorded and primarily featured as Boku Dake ga Inai Machi ' s opening theme. In Flashing Before My Eyes, the song is used for ending credits. In Treasure, a graffiti under the bridge spells out "Re:Re:", which is used to commemorate the anime's opening theme.

Lyrics
Kimi wo matta boku wa matta togirenai ashita mo sugi de itte tachidomatte furi kaette tomedonai kyo wo naki atta kiokudatte to o ni nante nokoranai monoto omoishitte boku wa zutto kakimushitte kokoro no sumikko de naita sochite douka nakusanai deyotte kuuka shita, sugiru hibi wo koukai shiten dayotte sou ii nishita ano hi tsunagi atta toki mo atta bodokenai kanshou mochi yotte sore ga boku　no suhetedatta sore motatta ima ukushitanda katachidatta toki ga tatte kawari yuki monoto omoishitte boku wa zutto kakimushitte douka nakusanai deyotte kuuka shita, sugiru hibi wo koukai shiten dayotte sou ii nishita ano hi kimi wo matta boku wa matta togirenai ashita mo sugite itte boku wa kyo mo kakimushitte wasurenai kizu wo tsukete irundayo kimi janaitosa