Fics like Just This Once, Be My Girlfriend

Claire Kagenou finds herself in a bind as she helps Princess Alexia deal with an arranged marriage.

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1. Eminence of the Side Character by Greyghost412 (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), The Eminence in Shadow (Anime))
2. What have I gotten myself into again? (MHA x eminence in shadow fanfic) by Gimmethecoffee (陰の実力者になりたくて！ | The Eminence in Shadow (Anime), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), more)
3. Project Shadow Garden: Ascension by Elhayot (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
4. Askbox fic - Stall of Wonder Tools by M4typewriter (IS: Infinite Stratos, 魔法科高校の劣等生 | Mahouka Koukou no Rettousei | The Irregular at Magic High School, more)
5. Eminence Behind the Throne by LeoHiggins (陰の実力者になりたくて！ | The Eminence in Shadow (Anime), 陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))
6. Hero and Eminence (in the Shadows) by Wireline (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
7. Bloody Princess From The Shadows by RosewenWrites (陰の実力者になりたくて！ | The Eminence in Shadow (Anime), 陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))
8. Those within the Shadows by Plasma_Assassin (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))
9. [ON HIATUS] But I made it up? (Fan continuation) by alexandreeeeep (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime), more)
10. It was soon to foil: I became a harem protagonist by CallingTheNest (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
11. Shadows Over Earthland by SlitheryOwl777 (Fairy Tail, 陰の実力者になりたくて！ | The Eminence in Shadow (Anime), more)
12. Obsessions in Shadows by Sonic_Shine (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
13. Stall of Wonder Prompt Sales by M4typewriter (陰の実力者になりたくて！ | The Eminence in Shadow (Anime), 陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), more)
14. My Eminent Academia by UnholyExcaliber (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime), more)
15. Last Dragonborn's Journey in the Omniverse by Player102170134 (ダンジョンに出会いを求めるのは間違っているだろうか | DanMachi | Is It Wrong to Try to Pick Up Girls in a Dungeon? (Anime), 陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), more)
16. Naked Mercy by Archaon (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
17. But I made it up? by The_Real_Lee (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels), 陰の実力者になりたくて！ | The Eminence in Shadow (Anime))
18. The Eminence in Shadow Just Realises that He is an Eminence in Shadow by HaOhRyu9298 (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))
19. The revelation by Saph3759 (陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))
20. He Belongs to Shadow Garden by GraveSolice (陰の実力者になりたくて！ | The Eminence in Shadow (Anime), 陰の実力者になりたくて！ | The Eminence in Shadow - Aizawa Daisuke (Light Novels))