Searching the World for My Ex-Boyfriend

As a saniwa, I've always worked hard to keep my honmaru running. But one day, I was suddenly told I had "Hanahaki disease"!? What? It's only a similar illness, but I still have to confess to the person I love, or I'll die!! What! If I can't cure this illness, I'll never get to see pretty boys and little boys again!? To hell with that! But I've just lost my memory... I can't remember who I ever had a crush on! So my only clue is my old diary. After arranging a series of confession events at the honmaru to no avail, I had no choice but to grab what seemed to be a {memoir of my ex-boyfriends} and search all over the world for them. Unfortunately, it seems none of my ex-boyfriends are ordinary. One's a brutal member of the Black X Gang, another is a detective doted on by everyone, and another has an inexplicable connection to yokai. Some are always making edgy speeches about destroying the world, while others are hidden experts who kill people with basketball. The most terrifying one broke through a spaceship with his bare hands. At long last, I found a normal one, only to watch him calmly save the Earth... I'm starting to regret this... I asked sincerely, "Hi, are you one of the ex-boyfriends I dumped? Would you mind if I confessed to you again?" The pretty boy gave me a look like I was an idiot. "..." #I had no idea I was this amazing before I lost my memory! #Why are all of you trying to get back together with me? Let's end things on good terms! #Promise me you'll dump me after hearing my confession Theme: Let's work hard for world peace!