Setting out of home knowing you wouldn't be back for sometime did make Seiya sentimental, but it didn't make him feel like turning back.
He didn't go back home to his sister and he wouldn't just get too comfy in his own estate now.
The civilians in the street looked happy and comfortable, this brought a smile to his face as he was heading to Shoichi's home to pick him up to set out together.
He knew he didn't have to worry about them as much anymore, at least for the time being seeing as how he relayed responsibility to Yir,Gakusha,Tengo and Tsukumo.
Seiya couldn't imagine anything going wrong while they were gone but he also didn't want to vocalize these thoughts otherwise it'd sound as if he was tempting fate.
Once he reached their home, he'd knock on the door of their common home only distinguishable by the fact that there's an orange roof which helped identify the home as theirs.