The perfect song for the opening of my comic is actualy a brasilian song xD BUT If I had to chose from an anime OP, would be any from Bokura ga Ita because oh my god that anime. Between them, I choose Suki Dakara. Because It's about Nate's feelings of loneliness and love and the struggle dealing with such emotions.
But also Sunset, maybe as a second OP later xD Because it's about loneliness too. Even though the couple actualy is in good terms through the comic, Nate actually has a lot of hurt of someone who left his life an this plot goes on for a while in the comic and will be in focus in the future.
It took me a while to decide the songs, I don't usually watch shoujos so it's hard to find those type of OP xD I watched bokura ga ita 13 years ago lol that's a throwback