you might be wondering whay he did this ,it's because kou came back and he want's to hide hikaru from him
If that’s the case, then that really breaks my heart because that just shows even more that arashi is so sweet and he won’t get his moment with hikaru in the next chapter ╥﹏╥
you might be wondering whay he did this ,it's because kou came back and he want's to hide hikaru from him