Happy Halloween

 is a song covered by εpsilonΦ.

It was an original song by Junky and originally sung by Kagamine Rin.

It was announced in August 8, 2021 when the tracklist for the cover albums was released and wasn't made public until it was added to AAside as the event song for the Kanata Nijo focused event Junky Halloween in October 10 of the same year. There, it was described as "A song that was performed in a Halloween live. It's a Halloween song that Kanata likes".

It is included in the project first cover album, ARGONAVIS Cover Collection -Marble-, which was released on November 17, 2021.

It was arranged by Shinji Hijiki (HANO) -who was also in charge of all the other instruments and programming-, the guitar was played by Fujii Kentarou (HANO) and the drums by RYOTA.

Lyrics
Romaji= Nee mou kuraku narisou dakara Dechatte mo ii kashira? Chotto ne mahou ni kakerareta Kimi no okashi kara tabechau zo

Kitto mou kiri ga koku naru kara Minna atsumaru kana? Jitto matte amaimono gaman shita Gohoubi o hora

Hitotsu futatsu kane no ne Sawagidasu chiisai obaketachi Kyou wa yurushite kureru no Saa machi ni ikou

Datte Happy Halloween Itazura shichau zo ding-dong-dang Acchi mo kocchi mo trick or treat Kyandii wa kurenai no? Datte Happy Halloween Itaike na rantan panpunkin Tsukareta jakku mo odoru yo asa made

Datte Happy Halloween Obake no kabu datte la la la Kyou wa machijuu trick or treat Choko mo choudai yo Datte Happy Halloween Fushiga na sekai e youkoso Tsukareta jakku mo utau yo Let's trick or treat

Motto motto hoshii Yokubari goosuto Mou nai? sore nara Itazura no ejiki ne

Kurenai ie nante niwaki ni Toiretto peepaa guruguru shicha e Kon'ya wa rantantou shiteru nara amai no choudai Saa Let's Party Night

Hora datte Happy Halloween Tokei mo mawaru tick-tack Acchi mo kocchi mo trick or treat Memokuramu panpukinpai Datte Happy Halloween Dakara yofukashi shichau janai Tsukareta jakku mo nenai wa asa made

Datte Happy Halloween...

Kyou wa Happy Halloween Saa Let's trick or treat Akai kyandii koro ga shite Asa made netakunai Kanji = ねえ　もう暗くなりそうだから デちゃってもい い かしら？ ちょっとね　魔法にかけられた キミのお菓子から食べちゃうぞ

きっと　もう霧が濃くなるから ミン ナ 　集まるかな？ じっと待って　アマイモノ我慢した ご褒美を　ほら

ひとつ　ふたつ　鐘の 音 騒ぎ出す　小さいオバケたち 今日は許してくれるの さあ　街に行こう

だって Happy Halloween　 悪戯しちゃうぞ ding-dong-dang あっちもこっちも trick or treat　 キャンディーはくれないの？ だ って Happy Halloween　 幼気（いたいけ）なランタンパンプキン 疲れたジ ャ ックも踊るよ　朝まで

だって Happy Halloween　 オバケのカブだってラララ 今日は街中 trick or treat　 チョコも頂戴よ だ って Happy Halloween　 不思議な世界へようこそ 疲れたジ ャ ックも歌うよ　 Let's trick or treat

もっと　もっと　ほしい　欲張りゴースト も う ない？　 そ れなら　悪戯の餌食ね

くれない家なんて　庭木に トイレットペーパーぐるぐるしちゃえ 今夜はランタン灯してるなら　甘 い の頂戴 さぁ　 Let's Party Night

ほら　だって Happy Halloween　 時計も回る tick-tack あっちもこっちも trick or treat　 目もくらむパンプキンパイ だって Happy Halloween　 だから夜更かしし ちゃ うじゃない 疲れたジャックも寝ないわ　 朝まで

だって Happy Halloween･･･

今日は Happy Halloween さぁ　 Let's trick or treat 赤いキャンディー　コロがして 朝まで 寝 たくない English = Hey, looks like it's about to get dark now so would it be alright to go out, I wonder? A little magic was put on me, you see let's eat, starting with your desserts

It looks like the fog will get thicker so will everyone be getting together, perhaps? I firmly waited and held back on sweets And as for the reward, here

One, two, the sound of the bell the small ghosts making bustle it'll be alright for today so, let's get to town

'Caus it's Halloween let's play a prank ding-dong-dang trick or treat here there and everywhere, won't you give some candy? 'cause it's Happy Halloween, some innocent-looking pumpkin lanterns Even the tired Jack dances all until morning

'Cause it's Happy Halloween, even the ghost turnips, la la la trick or treat today all throughout town, also some chocolate please 'cause it's happy halloween, welcome to this wondrous world Even the tired Jack sings Let's trick or treat

Want more and more, the greedy ghosts So there's no more? Then they'll be prey to our pranks

As for those houses that won't give us any let's wrap the trees in their yard with toilet paper the lanterns will be lit tonight give us some sweets please So then let's party tonight

Hey 'cause it's Happy Halloween, the clock too continues to spin, tick-tack trick or treat here there and everywhere, pumpkin pies that dazzle the eye 'Cause it's Happy Halloween, so why not-let's stay up late The tired Jack won't sleep either all until morning

'Cause it's Happy Halloween...

Today it's Happy Halloween so now, let's trick or treat red candy rolling around don't wanna sleep till morning Translation by Tosiaki