| Song | シアワセ定義 |
| Artist | Duca |
| Album | 彼女と俺と恋人と。 オリジナルサウンドトラック Original Soundtrack "In Our Living Room" |
| Download | Image LRC TXT |
| [00:21.66] | 柔らかな陽が射した |
| [00:24.68] | カーテン越しの空 |
| [00:27.23] | まだ少し眠い目こする朝 |
| [00:33.83] | 色違いの笑顔に 変わらない笑顔を |
| [00:39.11] | ありふれた僕たちの毎日 |
| [00:45.04] | 重ね合わせるように |
| [00:48.47] | 思い寄り添うように |
| [00:51.53] | 大切にしたいから ずっとずっと |
| [00:57.60][03:00.77] | そばにいると それだけで |
| [01:00.60][03:03.65] | 心温かな気分 |
| [01:04.54][03:07.56] | 他に理由なんて何もいらないんだよ |
| [01:09.71][03:12.82] | 普通じゃない そんなコト |
| [01:12.73][03:15.75] | 大して問題じゃない |
| [01:16.72] | シアワセの定義なら 胸の奥に |
| [01:24.72] | 広がってる |
| [01:34.80] | 喜びも悲しみも一緒に分け合おう |
| [01:40.11] | つないだ両手は温かい |
| [01:46.75] | 確かに繋がってゆく 思い描く未来 |
| [01:52.02] | 特別な僕たちの毎日 |
| [01:57.95] | 壊れてしまわないように |
| [02:01.39] | 思い離れぬように |
| [02:04.38] | かけがえのない時間(とき)を |
| [02:09.01] | 一緒にずっと |
| [02:10.54] | 抱きしめると それだけで |
| [02:13.56] | 心満たされる気分 |
| [02:17.47] | うまく説明できない気持ちなんだよ |
| [02:22.63] | 普通なんて 価値観は |
| [02:25.65] | それぞれ自由でいいよ |
| [02:29.62] | シアワセの定義なら 笑顔で探そう |
| [02:47.77] | 喧嘩をして意地をはって |
| [02:50.87] | お互い素直になれず |
| [02:54.37] | 気まずくなっても |
| [02:57.58] | それでもきっと |
| [03:19.72] | シアワセの定義なら 胸の中に |
| [03:27.77] | 輝いてる |
| [00:21.66] | rou yang she |
| [00:24.68] | yue kong |
| [00:27.23] | shao mian mu chao |
| [00:33.83] | se wei xiao yan bian xiao yan |
| [00:39.11] | pu mei ri |
| [00:45.04] | zhong he |
| [00:48.47] | si ji tian |
| [00:51.53] | da qie |
| [00:57.60][03:00.77] | |
| [01:00.60][03:03.65] | xin wen qi fen |
| [01:04.54][03:07.56] | ta li you he |
| [01:09.71][03:12.82] | pu tong |
| [01:12.73][03:15.75] | da wen ti |
| [01:16.72] | ding yi xiong ao |
| [01:24.72] | guang |
| [01:34.80] | xi bei yi xu fen he |
| [01:40.11] | liang shou wen |
| [01:46.75] | que ji si miao wei lai |
| [01:52.02] | te bie pu mei ri |
| [01:57.95] | huai |
| [02:01.39] | si li |
| [02:04.38] | shi jian |
| [02:09.01] | yi xu |
| [02:10.54] | bao |
| [02:13.56] | xin man qi fen |
| [02:17.47] | shuo ming qi chi |
| [02:22.63] | pu tong si zhi guan |
| [02:25.65] | zi you |
| [02:29.62] | ding yi xiao yan tan |
| [02:47.77] | xuan hua yi di |
| [02:50.87] | hu su zhi |
| [02:54.37] | qi |
| [02:57.58] | |
| [03:19.72] | ding yi xiong zhong |
| [03:27.77] | hui |
| [00:21.66] | róu yáng shè |
| [00:24.68] | yuè kōng |
| [00:27.23] | shǎo mián mù cháo |
| [00:33.83] | sè wéi xiào yán biàn xiào yán |
| [00:39.11] | pú měi rì |
| [00:45.04] | zhòng hé |
| [00:48.47] | sī jì tiān |
| [00:51.53] | dà qiè |
| [00:57.60][03:00.77] | |
| [01:00.60][03:03.65] | xīn wēn qì fēn |
| [01:04.54][03:07.56] | tā lǐ yóu hé |
| [01:09.71][03:12.82] | pǔ tōng |
| [01:12.73][03:15.75] | dà wèn tí |
| [01:16.72] | dìng yì xiōng ào |
| [01:24.72] | guǎng |
| [01:34.80] | xǐ bēi yī xù fēn hé |
| [01:40.11] | liǎng shǒu wēn |
| [01:46.75] | què jì sī miáo wèi lái |
| [01:52.02] | tè bié pú měi rì |
| [01:57.95] | huài |
| [02:01.39] | sī lí |
| [02:04.38] | shí jiān |
| [02:09.01] | yī xù |
| [02:10.54] | bào |
| [02:13.56] | xīn mǎn qì fēn |
| [02:17.47] | shuō míng qì chí |
| [02:22.63] | pǔ tōng sì zhí guān |
| [02:25.65] | zì yóu |
| [02:29.62] | dìng yì xiào yán tàn |
| [02:47.77] | xuān huā yì dì |
| [02:50.87] | hù sù zhí |
| [02:54.37] | qì |
| [02:57.58] | |
| [03:19.72] | dìng yì xiōng zhōng |
| [03:27.77] | huī |