If you loved City Hunter Special: The Death of Vicious Criminal Saeba Ryo, try Fighting Spirit: Champion Road
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

City Hunter Special: The Death of Vicious Criminal Saeba Ryo
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Fighting Spirit: Champion Road
What they share
Theyboth carry the playful mood tag, and they sit in Action / Animation / Comedy territory. If that's the register that drew you to City Hunter Special: The Death of Vicious Criminal Saeba Ryo, the second film will land in a comparable space — through a different lens.
playful
What Fighting Spirit: Champion Road is
Here's a boxing anime that really wants you to root for its underdog. Featherweight champ Ippo must defend his title against a med student also after his girl. The presence of old rivals adds some spice, but mostly this just wants to get you pumped.