I think angelo was the one who give love letter to ei and ask him to give it to yuujin(keichi's brother) when they were young as shown in the special chapter in fukigen kareshi no namadekata.( I saw the special in chinese though).
I mean chinese web
I think angelo was the one who give love letter to ei and ask him to give it to yuujin(keichi's brother) when they were young as shown in the special chapter in fukigen kareshi no namadekata.( I saw the special in chinese though).