Duet (Winter Ver.) (OST Kare wa Imouto no Koibito)
Futari de kawasu kotoba Sore ga uta ni narunonara Kimi ga kiniittano wa Donna melody nandarou? Kyuni kono sekai ga Kinou to tigattetemo Kimi ga ireba soredakede Mata kanaderareru duet.
Fukuzatsuna genjitsu mo Yosou dekinai sujigaki mo Futari de ireba tittomo Kowakunanka naikara Hibi wo irodoru light ya Kokoro mitasu yume ga Tarinai yori kimi no koto Ubawarerunowa mappira
Wasurenaide wasurenaide Boku wa kimi ga sukinanda Towa to kaite towa no aide Mamoritai to sitteyo Aishiteruyo aishiteruyo Zenbu kimini agerunda Dakara sah bokuno sobani oide
Futari de sugosu jikan Sore wo uta ni surunonara Buku ga tumabiitano wa Sukoshi sabishii onpusa Hitonatsukkoi hou ga Siawase yoberukara Kimi wo boku no sukima wo Futatsu de umeru duplet
Detaramena uwasa mo Mimi wo utagau jyodan mo Futari de kikeba mattaku Mayoukoto wa naikara Kimi no ureshii kao ga Boku no motif nandayo Nani wo shite mo kimi no koto Kizutsukeru nowa mappira
Kawaranaiyo kawaranaiyo Boku wa kimi ga sukinanda Tada to kaite tada no ai de Tsutsumitai to shitteyo Shinjiteruyo shinjiteruyo Kimi to towa ni ikirunda Dakara sah boku no soba ni oide
Kimiwo nosete futari wo nosete Colorful ni kanaderu melody hibikuyo Sara ni nosete omoi wo nosete kasaneau Mada dameda madada owarukotonai duet
Kimi ga itsumo boku ni kureru Takaramono ga sorenanda Kimi no namida kini no egao Wakachitaiyo docchimo Kuraku nagaku samui yoru mo Furati de asu wo terasunda Dakara sah motto soba ni oide
Wasurenaide wasurenaide Boku wa kimi ga sukinanda Towa to kaite eikyu no aide Mamoritai to sitteyo Aishiteruyo aishiteruyo Zenbu kimini agerunda Dakara sah bokuno sobani oide