I'm so happy Subaru (the sleepy shota) from Nanashi No Asterism appear again ,albeit with a different name. He's always been my favourite hopefully his boyfriend will make an appearance as well ^^
It's nice that the mangaka is bringing some of their old characters back. I'm not sure how well this setting will facilitate a large scale crossover, but man, a culmination of all of Kobayashi Kina's works would be pretty cool