| Song | HAPPY DAYS？ |
| Artist | 浪川大輔 |
| Artist | YoungStar |
| Album | 「K」Blu-ray＆DVD vol.1 キャラクターソングCD |
| [00:13.060] | 僕の世界は小さな部屋と |
| [00:19.040] | のどかな学校 それで全部 |
| [00:24.750] | 明るい友達と 小さな子猫 |
| [00:29.980] | それですべて満ち足りてる |
| [00:35.630] | |
| [00:36.630] | おすそわけのお弁当 |
| [00:39.670] | あったかい日だまりの下 |
| [00:42.860] | 小さな来客 ふわふわ毛玉 |
| [00:48.850] | 優しいお昼のまどろみの中 |
| [00:53.780] | |
| [00:54.780] | いつから？どこから？誰とここから？ |
| [01:00.330] | わかんないけど 毎日シアワセ |
| [01:06.750] | なんとなく楽しくて |
| [01:09.710] | なんとなく仲良しで |
| [01:12.290] | 幸福（こうふく）ってそういうもんでしょ |
| [01:17.540] | |
| [01:21.650] | 僕のホームはベッドとちゃぶ台 |
| [01:27.580] | 小さなキッチン それで全部 |
| [01:33.390] | 炊飯器の湯気と そろいの茶碗 |
| [01:38.550] | それですべて満ち足りてる |
| [01:44.260] | |
| [01:45.260] | ふわふわの卵焼き |
| [01:48.280] | 香ばしい魚の匂い |
| [01:51.430] | 驚異の来客 思わぬ事態 |
| [01:57.390] | それでもみんなでいただきますを |
| [02:02.350] | |
| [02:03.350] | いつまで？どこまで？誰とここまで？ |
| [02:08.940] | しらないけれど 今はシアワセ |
| [02:15.280] | わけもなく一緒にいて |
| [02:18.270] | わけもなく笑ってて |
| [02:20.870] | 友達ってそういうもんでしょ |
| [02:25.860] | |
| [02:36.150] | ふいに呼び声が聞こえた気がした |
| [02:42.110] | 心揺さぶる 強い声 |
| [02:48.170] | ぬるく心地いい海の中 |
| [02:54.100] | ふいに触れた 心わしづかむ冷たい海流 |
| [03:04.610] | |
| [03:07.570] | いつから？どこから？誰とここから？ |
| [03:13.040] | わかんないけど 毎日シアワセ |
| [03:19.420] | なんとなく楽しくて |
| [03:22.400] | なんとなく仲良しで |
| [03:24.940] | 幸福（こうふく）ってそういうもん……でしょ？ |
| [03:31.280] | |
| [03:46.310] |
| [00:13.060] | pú shì jiè xiǎo bù wū |
| [00:19.040] | xué xiào quán bù |
| [00:24.750] | míng yǒu dá xiǎo zi māo |
| [00:29.980] | mǎn zú |
| [00:35.630] | |
| [00:36.630] | biàn dāng |
| [00:39.670] | rì xià |
| [00:42.860] | xiǎo lái kè máo yù |
| [00:48.850] | yōu zhòu zhōng |
| [00:53.780] | |
| [00:54.780] | ?? shuí? |
| [01:00.330] | měi rì |
| [01:06.750] | lè |
| [01:09.710] | zhòng liáng |
| [01:12.290] | xìng fú |
| [01:17.540] | |
| [01:21.650] | pú tái |
| [01:27.580] | xiǎo quán bù |
| [01:33.390] | chuī fàn qì tāng qì chá wǎn |
| [01:38.550] | mǎn zú |
| [01:44.260] | |
| [01:45.260] | luǎn shāo |
| [01:48.280] | xiāng yú bi |
| [01:51.430] | jīng yì lái kè sī shì tài |
| [01:57.390] | |
| [02:02.350] | |
| [02:03.350] | ?? shuí? |
| [02:08.940] | jīn |
| [02:15.280] | yī xù |
| [02:18.270] | xiào |
| [02:20.870] | yǒu dá |
| [02:25.860] | |
| [02:36.150] | hū shēng wén qì |
| [02:42.110] | xīn yáo qiáng shēng |
| [02:48.170] | xīn dì hǎi zhōng |
| [02:54.100] | chù xīn lěng hǎi liú |
| [03:04.610] | |
| [03:07.570] | ?? shuí? |
| [03:13.040] | měi rì |
| [03:19.420] | lè |
| [03:22.400] | zhòng liáng |
| [03:24.940] | xìng fú? |
| [03:31.280] | |
| [03:46.310] |