It’s just speculation, but I think this might have something to do with his master. I also think Nirei’s info will be the key to finding Sou, because in the past chapter, Nirei said that Suo hates natto, and Sou asked him where he got that information. So I think Nirei might have met someone who’s close to Sou or has a connection with him. I'm sure he didn’t withdraw with bad intentions, and I’m lowkey hoping to see Sou cry when Sakura helps him.
It’s just speculation, but I think this might have something to do with his master. I also think Nirei’s info will be the key to finding Sou, because in the past chapter, Nirei said that Suo hates natto, and Sou asked him where he got that information. So I think Nirei might have met someone who’s close to Sou or has a connection with him. I'm sure he didn’t withdraw with bad intentions, and I’m lowkey hoping to see Sou cry when Sakura helps him.