Basically what I am looking for is a romantic comedy with male main char. I have two scenarios that I I am looking for.

First is the case where our protag is kinda strong (trained in martial arts or yankee, or ex yankee, or yakuza, u get the image) but the female love interest apparently loathes violence and/or violent person so our protag then tries his best to pretend weak or hide his strength to fit her bill.

Second scenario is a little bit harder to find I think. It's similar to the one I described above in the way that male protag is strong, but the twist is the female main is also strong and apparently has a penchant for frail and kind hearted boys whom she can protect, so again the protag pretends to be weak to float her boat.

Demographic doesn't matter but I think shounen would be the best fit for the image I have in mind.

I sincerely thank anyone who voluntarily spare their precious time answering this ridiculous quest of mine, regardless of the answer.

probably not exactly what you're looking for, but Yankee-kun to Megane-chan might work in the since that the love interest is also strong and an ex delinquent. best I can do.

I second that, but be warned.

Hmm.. I don't think it fits my image.. but thanks anyway!! Ocha Nigosu actually kinda fits the criteria I mentioned.. but the Male lead doesn't really pretend he's weak, he just tries to avoid doing the violence directly in front of his love interest. But I think you can see where I am going with this request clearer with this example I hope.. again, Thank you!!

There are two shoujo oneshots with similar, albeit not identical plots to what you are looking for:

Oneshot #1: The female is strong and an ex-delinquent and joins the student moral committee to be closer to the male lead who is the president (as he saved her with his kindness before), so she is hiding her strong side thinking that he is weak and want to avoid him finding out her secret. Except the male lead is actually the heir of a yakuza leader so he is strong also and hiding his past.

Oneshot #2: People assume the female lead is a delinquent due to her looks, so she pretends to be one, but in actuality she is weak and not prone to violence. She is saved on the train by the male lead (due to her anemia) who is shorter and frail-looking so she tries to get close to him by assuming a "watch over" role, but later it's revealed that he is actually a karate champion and saw through her act the whole time.

Let me know if you are interested and I can try to find these titles (can't remember off the top of my head).

________________
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Wow these are really intriguing, particularly the second one. I'd like to read them! Please do share the names if they haven't escaped your mind my good fella. Many thanks in advance!