Heartwarming / Ikemen Sengoku

• Sasuke's friendship with the MC, in general. It's shown in every route that even though Sasuke and the MC are on opposing sides and Sasuke didn't even see her for four years, Sasuke never forgot about her and his desire to help her return home during these four years and always goes out of his way to help her even if it means turning his back on his boss and other friends.
  Sasuke: I've met some very special people here. People I don't want to leave. But the one person I really don't want to be without is you.
  MC: Sasuke, are you kidding? Me—?
  Sasuke: You're the only one here from the modern age like me. I continued my wormhole research in this time period for you. I promised myself the day I arrived, four years ago, that I'd find you and return with you to the present.
  • This becomes even more Heartwarming in Hindsight when you learn on Sasuke's route just why he's so devoted to helping the MC in any way he can: the MC saved him from getting struck dead by lightning just before they got sent back in time and he never forgot how beautiful and radiant she looked as she did it.
• In Chapter 10 of Nobunaga's route, Nobunaga is struggling to tell the MC that he doesn't just want her body anymore and thinks that the best way to show her is to beat her again in a game of Go but when she tells him that there's no need for him to do so because she's already his, he realizes that she isn't the only one who has been "conquered" by him.
  Nobunaga: No, you've won. [...] You've won and taken something of mine. You conquered my heart.
• Near the end of Nobunaga's Dramatic route, the MC returns to Azuchi Castle and is greeted by all the warlords there scooping her up into a group hug so gigantic that only one hand of hers is left free for Mitsunari to shake.
• In Ch. 2 of Masamune's route, the MC confesses to him that she's been feeling overwhelmed by being in an unfamiliar and dangerous time so different from her peaceful modern time. Masamune wastes no time in making her feel more at ease by reassuring her that her choice to try and face the dangers of the Sengoku period instead of just holing up in her room already proves that she has the strong and courageous mindset she needs to survive in her new time.
  MC: All the things I know, all the ways I knew to survive and prosper in the present, those don’t work here. I’ve been thinking about how I can’t even protect myself, and how I don’t like that. This morning? I almost thought I should just shut myself up in my room.
  Masamune: And why didn't you?
  MC: Huh? Well... I decided it didn't suit me. Also, I was hungry.
  Masamune: Two good reasons.
  Masamune let out a short burst of laughter, smiling.
  MC: But I'm worried I’m just faking it. That inside, I'm still scared.
  Masamune: MC.
  Just the sound of his voice sent a current of electricity through me. It was an instant reaction. The whole world became more vivid.
  Masamune: Life is there for you to enjoy it. You can do that however you like, just make sure you're doing that for you, not for anyone else.
  MC: For myself?
  Masamune: What you said about it suiting you? That's what I mean. If you try to live anyone else's way, you’ll end up with regrets.
  His words hit me powerfully. My pulse pounded in my ears.
  Masamune: You can curl up into a ball in your room, or go out riding and laughing with friends. Either way, you'll get hungry sometime. But I know from experience, the food tastes a lot better when you're laughing than when you’re scared.
• Masamune and the MC's conversation at the end of his Dramatic route:
  Masamune: I realized that since I met you, my life hasn't felt dull once. I've fallen in a lake, gotten shot in the shoulder, had a burning temple fall on me—I’ll never live down the fact that Yukimura of all people had to pull me out—Anyway, I'm pretty sure I wouldn’t have experienced those things without you.
  MC: Wait. Why are you listing all the bad things?! Aren't there any good times you remember with me?
  Masamune: What are you talking about? They're all good times. You can drench me, burn me, shoot me. I'd do any of that again for you. You've kept my life packed full of excitement. I wouldn’t have it any other way. Would you?
  MC: You are so cool, Masamune.
  Masamune: You're admitting it! So, have I finally won your heart, lass?
  MC: Nope, sorry. You had it the whole time.
• Ieyasu responding to the MC sewing him a plush Wasabi to take into battle as a good luck charm by being momentarily rendered speechless and then giving her a big, lingering hug and telling her (in his typical tsundere way of telling her that he'll indeed take it with him) that she'd better not complain if he gets the Wasabi dirty or torn.
• Hideyoshi, as part of his atonement for initially treating the MC coldly, tells her that he wants her to use her sewing talents to make a really cute kimono for someone special to him, and then tells her only after she finishes making it that the special someone he was thinking about was her. The MC, who is still struggling to adjust to living in a time unfamiliar and often frightening to her, is so moved by his kindness that she bursts into tears.
• The flashback in Hideyoshi's route to the time he first met Nobunaga. Instead of sneering at or looking down on Hideyoshi for his low-born birth like everyone else in his life had done up to that point, Nobunaga told him that discriminating against someone based solely on their social class was rubbish and that only he himself could make his self into someone worthy, even though at that point he knew nothing about Hideyoshi except that he was a vagabond who just tried to rob him. His words had such a profound impact on Hideyoshi that he was inspired to turn his entire life around and reform himself into a kinder and more upstanding man.
  Nobunaga: You'd let someone else determine your value? Classifications like low-born and noble are meaningless. They're a relic of the past, long overdue to be abolished. You can't find a master? Rubbish. You ARE your own master.
  [...]
  Hideyoshi: ...Status and caste meaningless? That's the first time anyone's ever said that to me.
  I thought I'd lost the ability to clean up my act. That I was what everyone said I was.
  But it hit me. It wasn't over. The only things I'd lost were the things I'd given up.
• Mitsuhide, for all his teasing and snark towards Hideyoshi and the MC, responds to having fallen in love with the MC and having to see her be with Hideyoshi instead by merely telling her that he sincerely wants her to just be happy and replies to Masamune's comment that he must be unhappy watching MC be with Hideyoshi with, "On the contrary, I've found a modicum of happiness tonight. The woman I love is smiling."
• The epilogue to Shingen's Romantic route shows that the Oda and Takeda-Uesugi forces have succeeded in making peace and cooperating with each other. Seeing the two sides, who are normally at each other's throats in every other route, being friendly to one another with the MC looking on happily because she considers both sides her friends, is heartwarming and reaffirms that all of them, in spite of their grudges and clashing personalities, are good people at heart capable of finding common ground.
• This post by an autistic fan about how Mitsunari is one of the most empowering autistic characters they've ever seen in media (even if it may not have been intentional on Cybird's part) because he's consistently portrayed as kind, cheerful, and lovable despite his lack of social graces and forgetfulness about meals/sleep, in contrast with the common depiction of autistic characters as broken and/or incapable of empathy.
  "Instead of a broken unhappy Aspie who struggles with their "illness", we get the human sunshine. This is what makes him so adorable, so sweet and so loved. He’s accepted and liked the way he is and no one stresses the difficulties that could emerge."
• In Mitsunari's Romantic route, Hideyoshi's unconditional support of Mitsunari's risky plan to defeat the Ikko Ikki without killing any of them, even telling Nobunaga that he'll take all the blame in his vassal's place if the plan fails. It's even more poignant if you've read Hideyoshi's route and know that the reason he's so passionate about finding a way to spare the Ikko Ikki is that he was low-born himself and understands all too well the discriminatory treatment that poor, unprivileged people like the Ikko Ikki receive.
  Hideyoshi: The Ikko Ikki are comprised of the poor, the downtrodden, the outcasts...I know how they feel. I don't want to kill them either. It's a good plan, Mitsunari. That's why I'll stake my own reputation on it.
• Mitsuhide, contrary to his usual teasing of the MC in his route, being completely sincere and gentle in comforting her after her spirit's been broken by Yoshiaki's less-than-human treatment of her. Not only that, but he later kisses her at the end of his play staged specifically to piss off Yoshiaki just to get back at the person who made her cry.
  Mitsuhide: In a way, this world is a battlefield of ideals. We do not know, day to day, who will come out on top. But that does not give anyone the right to negate yours.
• In Mitsuhide's Romantic route, Kennyo treats the MC with unusual kindness despite his contempt for Mitsuhide because she was the one who spoke up in Ranmaru's defense and saved him from getting killed when he returned to Azuchi Castle. Also doubles as a Tear Jerker as his status as a hunted villain means that he will never be able to tell her this out loud.
  Kennyo (to himself): If we had not met in this form, perhaps I could have thanked her in person for what she did. Thank you, [MC's name], for saving my son.