Fics like How to be a Good Boyfriend

“Really? Is it true? I get to watch my student and adopted grandson fall in love for real? None of that damned teenage hormone crap? Oh, heavens! I didn’t think this would happen soon enough for me to witness it!” Because he’s useless and weak, Zenitsu can’t find it in himself to deny his Gramps at all. His mouth runs faster than his mind can catch up. “Ah, y-yeah! It’s true. I am seeing someone.” Or that one story where Zenitsu ropes Tanjirou into pretending to be his boyfriend in order to meet his Gramps.

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5. The Court(ing) of Tomioka Giyuu by cowboycorekimmi, sassiperere (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
6. ignite by kagshina (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
7. cry for the future (from the edge of darkness) by huixin (鬼滅の刃 | Kimetsu no Yaiba (Manga))
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9. Bright Waters by Firezaster (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
10. Killer Downpour by surveycorpsjean (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
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