G C Hoo oo hoo G C Hoo oo hoo G C Hoo oo hoo C G Hoo hoo hoo hoo G Am C G Hontou naraba imagoro G Cm7 G Boku no betto ni wa Em Am Am Em Anata ga, anata ga Em C Am D Anata ga mite hoshii G Am C G Kondo umareta toki ni wa G Cm7 G Yakusoku shiyou Em Am Am Em Dare ni mo jamasasenai NC G Futari no koto o G C Hoo oo hoo G C Hoo oo hoo G C Hoo oo hoo C G Rabu retaa G Am C G Yondemoraeru darou ka G Cm7 G Tegami o kakou Em Am Am Em Anata ni, anata ni Em C Am D Anata ni rabu retaa G Am C G Atarashii sutereo o G Cm7 G Chuumon sh*ta yo Em Am Am Em Boku no tokoro e NC G Asobi ni oide C D G G Aa aa, Rabu Retaa C D Hyakubun no ichi demo C D G G C Aa aa, Rabu Retaa D D Shinjite hoshii G Am C G Hoka no dare ni mo ienai G Cm7 G Hontou no koto Em Am Am Em Anata yo, Anata yo C G Shiawase ni nare Em Am Am Em Anata yo, Anata yo C G Shiawase ni nare ___ I'm not going to bother registering just to create these chords... It's a pretty simple original has the same chords as far as I know, but transposed down a full step strumming in the song.
Source: http://www.azchords.com/t/thebluehearts-tabs-35375/loveletter-tabs-294071.html