[Crossover] Who Went Through My Letters?

A true urban legend has long circulated in Yokohama: [Even if there is only a thin screen between two worlds, the wall you believe in is real. But I can help you break through that barrier, connecting the two dimensions. If you believe me, why not send a letter to my home? Because I'm the messenger.] In truth, Kirigiri, the real dimensional messenger, Saya, would love nothing more than to smash the magical bookcase that connects the two dimensions. Saya: Being a messenger is seriously making me want to cry! [The other person rejected your message and threw a bookcase at you.jpg] The urban legend post ends with its most important line: You, too, can break through the limits of dimensions and convey your feelings, so long as you find the right way. ☆Reading Guide☆: 1. Chatroom setting, lots of characters, and many separate arcs. 2. There is a real male lead. It's already decided: the youngest of the Problem Trio, a yandere little brat (shrugs). 3. It's probably a wish-fulfillment power fantasy. Probably a wish-fulfillment power fantasy. Probably a wish-fulfillment power fantasy. Important things are said three times. If your favorite character appears in this story, imagine yourself in their place for an even more satisfying experience. 4. Also known as The Right Way to Confess, The Coldest Show of 2016, and Messenger Saya Has It Rough. 5. Finally, enjoy! .tdtitle{background-color:#FFCC99;border-bottom-color:#FFCC99;border-bottom-style:solid;border-bottom-width:1px;padding:3px 5px 0;}.readtd{background:#FFFFFF;border:1px solid #FFCC99;}.sptd{background-color:#FFCC99;text-align:center;}.cytable td{border:1px solid #FFCC99;font-size:12px;padding:5px 3px 3px;}.cytable{background:#FFFFFF;border-collapse:collapse;}.controlbar{background-color:#FFFFFF;border:1px solid #FFCC99;}