Yandere Danganronpa: (He)Artless Deceit.
After being rescued from the Killing Game, you've noticed something...off with your friends.
Akira often sticks to your side and talks much more to you than before, although a cold and jealous look crosses her face when she sees you with someone else. Tomoya is always basically clinging to you, trying to have your undivided attention, looking jealous and pouting when you're not paying attention to him, but there's something much darker when you're interacting with someone else. Chiemi has been flirty with you, even touching your thigh playfully, but you can swear you've seen her look murderous out of the corner of your eye when you have your attention on someone else. Chou is always getting you to go to her concerts, giving you front row seats for free and getting sad when you don't or can't go, but she does everything to hang out with you even if she looks furious when seeing you talking to someone else. Hideyoshi hasn't changed but he's been trying to hang out with you more and more, changing his plans last second to come and see you. Itsumi has been making games as usual, although you swear the characters who end up in love always look like you and her. Izanami has vowed to protect you from whatever harm out of nowhere, keeping by your side and following you, looking kinda scary when she sees you with someone else. Katsuhiko is always trying to separate you from anyone else, even uncharacteristically trying to force you away from the person who you interact with. Kiyoshi, you swear he's stalking you but you don't have proof but he avoids you every day and blushes a lot when you talk to him. Kyouran is always trying to gain your trust and affection, serving you drinks, buying you things and hugging you. Otome is always giving you early access to her manga works, even occasionally making time to spend time with you and blushing slightly when you get close to her. Rei seems to follow you, despite her blindness, somehow she seems to know wherever you are. Yumeo is always trying to be with you, remaining cold but protective and possessive about wherever you go. Takeshi is trying to get you to lift weights, but when he's not doing that he's always trying to spend time with you and learn more about you. Shion, out of everyone is the most friendliest to you but slightly more possessive, making sure to always know where you're going and yet is always somehow overly friendly towards you. Satoru tries to impress you with everything he can, blushing furiously when he's just in the same room as you.
Although those mission persons and corpses of those you talked to in the past is probably just a coincidence... Right?