Fanfiction.net could also be a good place. There are many authors who write about different pairings from 'Food Wars', including Soma and Hisako. However, the quality can vary, so you may need to read through a few to find the really good ones. You can also look for reviews or ratings to help you decide which ones to read.
You can try fanfic websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you might be able to find some great Soma x Hisako ones there. Just use the search function and type in the relevant tags.
Another option is to check out some dedicated 'Food Wars' fan communities on social media platforms like Reddit or Tumblr. Sometimes, fans share their own fanfics or recommend good ones they've read. You can ask in those communities if anyone has any suggestions for Soma x Hisako fanfics.
Chapter 286, "Lost Battle II", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with Fenrir stood tall, his muscular frame shrouded in a thin layer of... and follows through with What now?" Damien stared at the distant horizon, where Velthorne lay....
Chapter 268, "Assembling A Team Of Four", is the clearest early answer because it turns Ranked Mercenary's situation into a concrete plot event. It opens with Damien emerged from the teleportation array, blinking against the... and closes on As they entered the Dean's office, the first thing Damon noticed was....
Chapter 226, "Impromptu Celebration", is the clearest early answer because it turns Damien's situation into a concrete plot event. The chapter gives readers a real answer by opening on ugh..." "Mmm..." The muffled noise stirred Damien from his slumber,... and ending on However, as he entered the pub, he was met with yet another surprise..
Chapter 370, "Elias's Encounter", is the clearest early answer because it turns Elias's situation into a concrete plot event. The chapter gives readers a real answer by opening on Only a presence that glowed behind the eyes, soft and colorless—like... and ending on The third, a metal cube vibrating at an almost invisible frequency,....
Chapter 241, "The Ambush In A Cavern", is the clearest early answer because it turns Damon's situation into a concrete plot event. It opens with The clearing was eerily quiet in the aftermath of their brutal... and closes on Corvus, the leader of the Dunters, narrowed his eyes.. The key payoff is that the chapter closes with Hungry..., which gives the current arc a stronger narrative position and pushes the power growth onward.
Chapter 181, "The First Layer Of Hell", is the clearest early answer because it turns Morteze's situation into a concrete plot event. The chapter gives readers a real answer by opening on Leana stood proudly before her brother, gesturing toward the three... and ending on Well, now that my brilliant reputation is out in the open," Morteze....
Chapter 480, "New Variants", is the clearest early answer because it turns Damien's situation into a concrete plot event. The chapter turns that into something concrete by moving from There was no dramatic punch, no drawn-out conflict. to But several others were the variants he'd spoken about.. What makes it stick is that the chapter closes with "Disgusting things." He spat., which gives the main cast a stronger narrative position and pushes the power growth onward.
Chapter 270, "Storytelling With Arielle", is the clearest early answer because it turns Damien's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Well, soon enough, the thing monitoring me revealed itself and it... and follows through with Eat your food before it gets cold.. By the close, So, somehow, you just… appeared in an open field?" Damien nodded., and the chapter closes with "Good." She turned toward the door.
Chapter 388, "Night Seige", is the clearest early answer because it turns Godsthorn's situation into a concrete plot event. The chapter gives readers a real answer by opening on Just as Razel shouted, "She's activating something!" But they were... and ending on Godsthorn's tone was tired, but edged with steel.. In story terms, the chapter closes with "Because," she said, "you're not the only one with secrets buried in ElderGlow.
Chapter 322, "The Search Begins", is the clearest early answer because it turns Damien's situation into a concrete plot event. The chapter turns that into something concrete by moving from Damien didn't remember when sleep claimed him. to Roads, mountains, cities, trade routes, monster territories, even the....