the opening of Hunter X Hunter. I think it's Ohayou, because the melody, and lyrics sounds right. When listening, it's like the beginning of a new day.
I also like Kyou Kara Maou's Hateshinaku Tooi Sora Ni
There's a song I like by my favorite band called Kakusei Heroism ~The Hero Without a Name~ by An Cafe. I read that it's the opening of the anime Darker than Black (not sure which season) Does that count? even if I haven't watch the anime haha
I like the both op/ed songs of Death Note anime (the L arc only) when the opening song changed the the loud-rap-techno music, I started to lower the volume down. It's too loud, and I watched the anime during the middle of the night. Haha.
I also like Paradise Kiss's both opening and ending, Lonely in Gorgeous is so cute. And Do You Wanna by Franz Ferdinand, umm, it's quite rare for me to see an anime with a English-language op/ed song sung by a non-Jap artist.
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