Comprehensive Manga: Growth Story of a Brother-complex Younger Brother

Keigo Atobe's twin brother, who adores his older brother (pure brotherly love!). The story follows the growth of a sporty young boy, initially focusing on slice-of-life, then transitioning to the Prince of Tennis main storyline, a crossover anime plot, and possibly a Haikyuu!! main storyline later on. It might even go off on its own, though I'll try my best, but it's still undecided. The main pairing is Yukimura, and it's unlikely to change unless something unexpected happens... well, we'll see. Also: the romance will develop in the later part of the main story, and it will be slow-paced and gentle, not dramatic. If you're expecting a sweet, lovey-dovey romance from the start, please ignore this. The protagonist isn't that kind of character; the kind who dominates the world with tennis is out of the question. This protagonist won't just be involved in one sport club, as I want to incorporate elements from several anime. It will be more slice-of-life. Note: slice-of-life, please don't ask me why he doesn't dominate the world, he won't. Due to work, I'll try my best to maintain consistent updates, occasionally taking days off to update around 6,000 words a day, and I'll try to keep it stable to avoid abandoning the project. Please support me! As usual, I'll patch up any regrets I can, but there's nothing I can do about those. This story doesn't follow logic, so please just enjoy it.