Responses
We all think norihiko is dead after the house fire. But he returns in chapter 25 with a knife, probably to kill off ikuro. But when Ikuro sees him, Ikuro is overjoyed and gets emotional in a very happy way. Ikuro smiles and runs to him to him to embrace him. Ikuro had really missed norihiko and he was broken when he thought norihiko was dead.
The manga is ending soon btw
https://umi-hotaru.com/magazine/onblue/tourou-no-ori-25wa/
Its in japanese so use google translate. You'll get a rough idea

So, I think I'm the only one who likes Norihiko.
That sexy possessive and manipulative bastard.
Spoiler:
If I understood it correctly, Norihiko died during a fire in the mansion.
The older brother was able to save the younger.
I wish this weren't dropped.