You could check out 'The Secret of Angel'. It shares some similarities in terms of character development and the exploration of themes related to beauty and identity.
Some mangas similar to True Beauty could be 'My ID is Gangnam Beauty' and 'Cheese in the Trap'. They share elements of romance and character development.
I'd recommend 'My ID is Gangnam Beauty'. It shares some similarities with True Beauty in terms of the focus on appearance and self-discovery.
One manga that could be similar is 'Fashion King'. It has a similar focus on fashion and character development.
Well, 'Skip Beat!' could be similar. It also focuses on the entertainment industry and has interesting character developments.
I'd suggest 'Glamorous Makeover.' It shares similarities in focusing on beauty tips and the characters' pursuit of looking good, much like in Beauty Research Club. The storylines might have some common themes too.
I think 'Skip Beat!' might be somewhat similar. It has elements of fashion and personal growth like in Beauty Pop.
I think 'Fruits Basket' is somewhat similar. Both have engaging character development and heartwarming moments like in Beauty Pop. Also, the art styles are somewhat alike.
One manga that could be similar is 'Ouran High School Host Club'. It has a lot of romantic elements and charming characters.
I'd recommend 'Love Beyond Appearances'. It has a couple facing challenges and societal expectations, similar to the themes in Beauty and the Beast. The characters have to look beyond the surface to discover each other's true selves.
I think 'Blue Lock' might be similar. It also focuses on personal growth and challenges in an educational setting.