You can start by looking on fanfiction.net. It has a large collection of both MHA and Naruto fanfictions, and you can easily search for crossovers. Archive of Our Own (AO3) is also a great place. It has a more organized tagging system, which makes it easier to find specific types of fanfictions, like those focusing on certain character relationships or plot elements that involve both MHA and Naruto.
There are also some Reddit communities dedicated to fanfiction. Subreddits like r/FanFiction or r/MHA and r/Naruto might have threads where people share their favorite crossovers or even post their own. You can also follow some of the more popular fanfiction writers on social media platforms like Twitter. Sometimes they'll announce new stories or share links to their works that involve the mha and naruto crossover.
The best chapter pointer here is Chapter 106, "The Beginning of the Butterfly Effect". It opens with Thinking of this, He Yun nodded with a hint of anticipation. and closes on Jiang Li's fingers lingered over the three copper coins, her clear voice....
A practical answer is Chapter 137, because it turns the idea into a concrete scene. The chapter opens with Jiang Li personally went to Lai Fu's tomb and performed a small ritual., adds pressure through You help me with this, and I can share some with you;
The best chapter pointer here is Chapter 117, "What Jiang Li Can Do, She Can Do Too!". It opens with Fragrant and cloyingly sweet potatoes and corn were out of the pot, and Qi... and closes on Since entering puberty, his mother had exerted strict control over his....
A practical answer is Chapter 107, because it turns the idea into a concrete scene. The chapter opens with On the plane, when He Yun had taken off his mask and greeted her..., adds pressure through After a brief, composed delay and a small nod, she said, "OK, Brother..., and ends on Although Su.
Look to Chapter 114 for the clearest answer. It begins with As time passed, the number of viewers in the live broadcast gradually..., keeps building through After a whole day of trending searches yesterday, the popularity of..., and lands on But just now, an uncle came and said not to give you.
The best chapter pointer here is Chapter 109, "Not One Deserves to Stay on His Friends List!". It opens with And another thing," Jiang Li said, taking out a tissue to wipe her lips,... and closes on [You're indeed more likable than me, the type of likable where people....
The best chapter pointer here is Chapter 135, "Lai Fu is Missing!". It opens with The sun blazed down mercilessly, but thankfully, the path to the mountain... and closes on Are you healed from your injuries?" Zhao Lang smiled and nodded, "Thank....
A practical answer is Chapter 113, because it turns the idea into a concrete scene. The chapter opens with The next day, Jiang Lili was up before dawn as usual., adds pressure through Okay, keep them steady;
A practical answer is Chapter 108, because it turns the idea into a concrete scene. The chapter opens with In a glamorous Michelin three-star restaurant, Su Yinwan and Shang..., adds pressure through Jiang Yan, "...." Did he chew 20 times just now?, and ends on Hey, I've been waiting for you for.
Chapter 109 is the strongest chapter-level answer because it starts from And another thing," Jiang Li said, taking out a tissue to wipe her lips,... and follows through on [You're indeed more likable than me, the type of likable where people....