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Works (59)

OC original character イラスト illustration OriginalCharacters Illustration アサシンエイジェント AssassinsAgent オリジナル original clipstudiopaint clip studio paint KeyVisual Vampire Original Vtuber virtual YouTuber Halloween pixivHalloweenEffect HalloweenParty2025 オリジナルカラー rkgk doodle Human OriginalCharacter AssassinsAgentLoreStory
OC, OriginalCharacters, Songkran2026_Art / OC Songkran 2026 OC Songkran 2026
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Sekine Doyoubi
15
OC, OriginalCharacters, Illustration / OC Genderswap Rkgk OC Genderswap Rkgk
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Sekine Doyoubi
OC, OriginalCharacters, AssassinsAgent / Assassins Agent Prologue Ch.1 CG Assassins Agent Prologue Ch.1 CG
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Sekine Doyoubi
OC, OriginalCharacters, AssassinsAgent / Assassins Agent Prologue cover Assassins Agent Prologue cover
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Sekine Doyoubi
Illustration, Human, clipstudiopaint / Sekine Doyoubi birthday Sekine Doyoubi birthday
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Sekine Doyoubi
7
Jewel, Gems, Rain / Stay in the rain cover Stay in the rain cover
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Sekine Doyoubi
LunarNewYear, Valentine, OC / Valentine&LNY Francis x Zeria Valentine&LNY Francis x Zeria
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Sekine Doyoubi
8
AssassinAgentLoreStory, AssassinsAgent, OC / 2025 Birthday illustrations 2025 Birthday illustrations
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Sekine Doyoubi
Trio, pixivValentineEffect, LunarNewYear / Valentine&Lunar New Year Trio Valentine&Lunar New Year Trio
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Sekine Doyoubi
2
Banner, Vtuber / 新しいXのバナー / January 31st, 2026 新しいXのバナー
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Sekine Doyoubi
OriginalCharacter, SplashArt, OC / Zeria Splash Art Zeria Splash Art
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Sekine Doyoubi
illustrations, OC / Happy Children Day / January 10th, 2026 Happy Children Day
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Sekine Doyoubi
Vtuber, KeyVisual, SplashArt / Dark Sekine Splash Art reveal Dark Sekine Splash Art reveal
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Sekine Doyoubi
Christmas, RKGK, OC / Christmas Cuddle RKGK Christmas Cuddle RKGK
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Sekine Doyoubi
7
Human, Vampire, Birthday / 2025 OC Birthday (1) 2025 OC Birthday (1)
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Sekine Doyoubi
3
Portrait, OC / OC Trading Card (Lore Story) / December 10th, 2025 OC Trading Card (Lore Story)
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Sekine Doyoubi
vampire, blood, oc / OC rkgk OC rkgk
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Sekine Doyoubi
Xmasnight2025, OC, OriginalCharacters / Internship Christmas Night Internship Christmas Night
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Sekine Doyoubi
IAT_2025, OC, OriginalCharacters / The beginning of my journey The beginning of my journey
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Sekine Doyoubi
2
Ocart, Smallartist, OC / 新しいOC - ノエル・クリス 新しいOC - ノエル・クリス
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Sekine Doyoubi
2
fanart, Thailand, Thaighost / Nang Tani, Lot 43 Fanart Nang Tani, Lot 43 Fanart
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Sekine Doyoubi
2
OC, OriginalCharacters, Illustration / OC Pocky Day 2025 2 OC Pocky Day 2025 2
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Sekine Doyoubi
2
OC, OriginalCharacters, Illustration / OC Pocky Day 2025 OC Pocky Day 2025
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Sekine Doyoubi
2
OC, OriginalCharacters, Illustration / OC Trio Pocky Day OC Trio Pocky Day
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Sekine Doyoubi
2
OC, PockyDay, AssassinsAgentLoreStory / OC Pocky Day Francis x Zeria OC Pocky Day Francis x Zeria
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Sekine Doyoubi
OC, OriginalCharacters, Vampire / OC - 草薙ルイス OC - 草薙ルイス
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Sekine Doyoubi
deadbydaylight, clipstudiopaint, inking / Dead by Daylight Vtuber Collab Dead by Daylight Vtuber Collab
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Sekine Doyoubi
RKGK, OC / OC rkgk / October 30th, 2025 OC rkgk
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Sekine Doyoubi
4
AssassinsAgent, Halloween, OC / OC Halloween イラスト - Ren OC Halloween イラスト - Ren
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Sekine Doyoubi
4
AssassinsAgent, HalloweenParty2025, Halloween / OC Halloween イラスト - Taika OC Halloween イラスト - Taika
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Sekine Doyoubi
2
Blackcat, Male, Halloween / OC Halloween イラスト - Bon OC Halloween イラスト - Bon
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Sekine Doyoubi
4
OC, Halloween, HalloweenParty2025 / OC Halloween イラスト - Cruz OC Halloween イラスト - Cruz
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Sekine Doyoubi
4
Halloween, ClipStudioPaintArt, OC / OC Halloween イラスト - Naegi OC Halloween イラスト - Naegi
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Sekine Doyoubi
4
Illustration, OC, Halloween / OC Halloween イラスト - Akane OC Halloween イラスト - Akane
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Sekine Doyoubi
7
Clipstudiopaint, OC / Assassins Agent chibi イラスト / October 3rd, 2025 Assassins Agent chibi イラスト
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Sekine Doyoubi
8
clipstudiopaint, OC, AssassinsAgent / Assassins Agent Lore Story Chibi Assassins Agent Lore Story Chibi
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Sekine Doyoubi
clipstudio, illustration, Vtuber / Sekine Doyoubi 1.0 Sekine Doyoubi 1.0
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Sekine Doyoubi
6
clipstudiopaint, valorant, vtuber / VALORANT Cosplay Art VALORANT Cosplay Art
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Sekine Doyoubi
3
clipstudiopaint, Vtuber / 破壊されたの自分 / July 2nd, 2025 破壊されたの自分
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Sekine Doyoubi
14
Yandere, OC / Yandere OC Sketch / May 16th, 2025 Yandere OC Sketch
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Sekine Doyoubi

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