| Song | 赤い暗には几千の (オープニング ムービー) |
| Artist | 来兎 |
| Album | UNDER NIGHT IN-BIRTH ORIGINAL SOUNDTRACK SIDE-ABYSS |
| Download | Image LRC TXT |
| [00:33.60] | なにもかも埋没したセカイ |
| [00:35.87] | それなのに背後くらい気にしてみる |
| [00:42.72] | とりあえず存在の確認 |
| [00:45.11] | どうしても自分のカタチなぞれない何故 |
| [00:52.16] | 雑踏で怯えて 己の価値観 委ねる |
| [00:56.72] | 完全に完璧な 能力(チカラ)なんか ただの幻想 |
| [01:01.27] | 罪悪感 侵して いくばくかの奇跡に縋(すが)る |
| [01:08.09] | それでも |
| [01:11.25] | 掴めない魂 虚空を彷徨う |
| [01:15.69] | 溶け出してくる 赤い闇 幾千の答え |
| [01:20.55] | 抱きしめる情報 解読不能 |
| [01:24.66] | 壊れる 君を守りたい |
| [01:29.22] | 飛び込んでゆく 無限に |
| [01:45.76] | 絶え間なく織りなされる怪奇 |
| [01:48.04] | 囚われた幻覚幻聴 振り切る |
| [01:54.78] | 途切れだす 記憶が零れてく |
| [01:57.14] | 書き換える 感情の理論 永劫無限(終わらないループ) |
| [02:03.96] | 散々な災難の 現象を検証 吐き出す |
| [02:08.58] | 書きなぐる計算式 絡まりの空回り続く |
| [02:13.22] | 現実感 亡くして 訪れる壊滅 |
| [02:18.22] | 赦すわけには |
| [02:23.36] | 混沌と混雑 虚数の曲線 |
| [02:27.65] | 流出する漣(さざなみ)に幾千の謎を |
| [02:32.52] | 溢れ来る 誰かの存在の意味 |
| [02:36.29] | 守るよ 気づかれなくても |
| [02:41.05] | 盾にした 自分自身 |
| [02:58.16] | 不幸の連鎖 絶ち伐る対価 |
| [03:07.30] | 伸ばした指先から 滴る涙 |
| [03:20.39] | 掴めない魂 虚空を漂う |
| [03:24.62] | 溶け出してくる赤い闇 |
| [03:27.30] | 幾千の答え |
| [03:30.79] | 掴めない魂 虚空を彷徨う |
| [03:35.04] | 溶け出してゆく 赤染まる |
| [03:37.62] | 幾億の答え |
| [03:39.71] | 抱きしめる情報 解読不能 |
| [03:43.87] | 壊れる 君を守りたい |
| [03:48.50] | 飛び込んでゆく 無限に |
| [03:52.89] | 閉じ込められた 永劫 |
| [00:33.60] | mai mo |
| [00:35.87] | bei hou qi |
| [00:42.72] | cun zai que ren |
| [00:45.11] | zi fen he gu |
| [00:52.16] | za ta qie ji si zhi guan wei |
| [00:56.72] | wan quan wan bi neng li huan xiang |
| [01:01.27] | zui e gan qin qi ji zhui |
| [01:08.09] | |
| [01:11.25] | guai hun xu kong pang huang |
| [01:15.69] | rong chu chi an ji qian da |
| [01:20.55] | bao qing bao jie du bu neng |
| [01:24.66] | huai jun shou |
| [01:29.22] | fei ru wu xian |
| [01:45.76] | jue jian zhi guai qi |
| [01:48.04] | qiu huan jue huan ting zhen qie |
| [01:54.78] | tu qie ji yi ling |
| [01:57.14] | shu huan gan qing li lun yong jie wu xian zhong |
| [02:03.96] | san zai nan xian xiang jian zheng tu chu |
| [02:08.58] | shu ji suan shi luo kong hui xu |
| [02:13.22] | xian shi gan wang fang huai mie |
| [02:18.22] | she |
| [02:23.36] | hun dun hun za xu shu qu xian |
| [02:27.65] | liu chu lian ji qian mi |
| [02:32.52] | yi lai shui cun zai yi wei |
| [02:36.29] | shou qi |
| [02:41.05] | dun zi fen zi shen |
| [02:58.16] | bu xing lian suo jue fa dui si |
| [03:07.30] | shen zhi xian di lei |
| [03:20.39] | guai hun xu kong piao |
| [03:24.62] | rong chu chi an |
| [03:27.30] | ji qian da |
| [03:30.79] | guai hun xu kong pang huang |
| [03:35.04] | rong chu chi ran |
| [03:37.62] | ji yi da |
| [03:39.71] | bao qing bao jie du bu neng |
| [03:43.87] | huai jun shou |
| [03:48.50] | fei ru wu xian |
| [03:52.89] | bi ru yong jie |
| [00:33.60] | mái mò |
| [00:35.87] | bèi hòu qì |
| [00:42.72] | cún zài què rèn |
| [00:45.11] | zì fēn hé gù |
| [00:52.16] | zá tà qiè jǐ sì zhí guān wěi |
| [00:56.72] | wán quán wán bì néng lì huàn xiǎng |
| [01:01.27] | zuì è gǎn qīn qí jī zhuì |
| [01:08.09] | |
| [01:11.25] | guāi hún xū kōng páng huáng |
| [01:15.69] | róng chū chì àn jǐ qiān dá |
| [01:20.55] | bào qíng bào jiě dú bù néng |
| [01:24.66] | huài jūn shǒu |
| [01:29.22] | fēi ru wú xiàn |
| [01:45.76] | jué jiān zhī guài qí |
| [01:48.04] | qiú huàn jué huàn tīng zhèn qiè |
| [01:54.78] | tú qiè jì yì líng |
| [01:57.14] | shū huàn gǎn qíng lǐ lùn yǒng jié wú xiàn zhōng |
| [02:03.96] | sàn zāi nán xiàn xiàng jiǎn zhèng tǔ chū |
| [02:08.58] | shū jì suàn shì luò kōng huí xu |
| [02:13.22] | xiàn shí gǎn wáng fǎng huài miè |
| [02:18.22] | shè |
| [02:23.36] | hùn dùn hùn zá xū shù qū xiàn |
| [02:27.65] | liú chū lián jǐ qiān mí |
| [02:32.52] | yì lái shuí cún zài yì wèi |
| [02:36.29] | shǒu qì |
| [02:41.05] | dùn zì fēn zì shēn |
| [02:58.16] | bù xìng lián suǒ jué fá duì sì |
| [03:07.30] | shēn zhǐ xiān dī lèi |
| [03:20.39] | guāi hún xū kōng piào |
| [03:24.62] | róng chū chì àn |
| [03:27.30] | jǐ qiān dá |
| [03:30.79] | guāi hún xū kōng páng huáng |
| [03:35.04] | róng chū chì rǎn |
| [03:37.62] | jǐ yì dá |
| [03:39.71] | bào qíng bào jiě dú bù néng |
| [03:43.87] | huài jūn shǒu |
| [03:48.50] | fēi ru wú xiàn |
| [03:52.89] | bì ru yǒng jié |