You might want to check out 'Ao Haru Ride'. It features complex romantic relationships and emotional turmoil, similar to Romeo and Juliet. The characters face challenges and heartbreak that can give you that similar feeling.
One manga that could be similar is 'Vampire Knight'. It has elements of forbidden love and tragic outcomes.
Chapter 14, "Nonstop Growth", is the clearest early answer because it turns Damien's situation into a concrete plot event. The chapter turns that into something concrete by moving from Damien stood in place, essence cores in both hands. to Essence devouring was his new best thing and he needed to continue.. What makes it stick is that the chapter closes with The forest was filled with resources that aided non stop growth for Damien and Luton.
Chapter 468, ", Reverse Beheading", is the clearest early answer because it turns Green Skins's situation into a concrete plot event. It opens with Again turning his head, the remaining two Terminators had already... and closes on Among them, three hundred Phoenix Warriors, led by Matins the Battle....
Chapter 400, ", Korolya Pays Taxes", is the clearest early answer because it turns Shang Yanwen's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Late into the night, the conversation had already ended when Shang... and follows through with Top students really are different!" Shang Yanwen was modest in....
Chapter 355, ", I Assure You", is the clearest early answer because it turns Brigade's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Even a corrupt magic dragon had flown to the battlefield. and follows through with Gu's voice arrived shortly after, "You must maintain the offensive."....
Chapter 402, ", Is This What You Call the Planetary Defense Army?", is the clearest early answer because it turns Gu Hang's situation into a concrete plot event. The chapter turns that into something concrete by moving from A fiscal surplus exceeding five billion a year, this is certainly a... to The five billion will all be spent, nothing good is left to save..
Chapter 474, ", Showing You the Corpse", is the clearest early answer because it turns Fury Flame Battle's situation into a concrete plot event. Early on, To kill Titus in a one-on-one duel was to usurp his position; to lead.... By the end, He wanted the head of Titus, not Muru..
Chapter 473, ", The Chieftain's End", is the clearest early answer because it turns Battle Group's situation into a concrete plot event. The setup is In a state of emergency, Titus had no choice but to act., but the pressure keeps building through With no way to muster troops from his stronghold, he could only call....
Chapter 329, ", Heijian Star Joins the Alliance", is the clearest early answer because a shaky connection becomes usable in the plot. Early on, In a sense, the Fatches Family could be considered to have 'brought.... By the end, In the future, if Gu Hang wished, he could rid himself of the trouble....
Chapter 379, ", Senior Central Government Official", is the clearest early answer because it turns Holy Terra's situation into a concrete plot event. It opens with After arriving at Wuji Star, he took advantage of the time when the... and closes on The head of the Dragonhawk Star Domain?. The key payoff is that the chapter closes with They were not exactly coming from afar;
Chapter 332, ", Titan is Completely Done", is the clearest early answer because it turns Knight Titans's situation into a concrete plot event. The chapter gives readers a real answer by opening on However, the increasingly torrential heavy artillery and fierce... and ending on Moreover, even if they could hold the line, who could come as....