Episode 3: Kazehaya telling Sawako how much she inspires him.
Kazehaya: Haven't you realized it yet? Yano and Yoshida, Hirano and Endo...they were all moved by you trying your best. Haven't you realized? It's you who's moving me.
Episode 6: Sawako's reconciliation with Chizuru and Ayane
Chizuru: Did you know? Without realizing it, we were already friends! We were already friends Sadako!
Episode 7: Sawako hangs out with friends after school for the first time, and walks home alone with Kazehaya.
Kazehaya: There might be times that I won't be able to help you from now on. If I can't, I'm sorry. Kuronuma, I don't think that I'm the type of person you think I am. I'm selfish, I'm really self-centered.
Sawako: That's okay. I don't care if you're selfish or self-centered. You don't have to do anything for me. It's all right.
Episodes 14 & 15: Sawako helping Kurumi, in spite of her prior nastiness, come to term with her feelings, and their relationship evolving into a more Friendly Enemy type.
Chizu's whole conversation with Toru before this is extremely heartwarming, showcasing what a Nice Guy he actually is and giving Chizu an opportunity to accept his engagement and even congratulate him.
2nd Season and Manga:
Episode 5: Ayane and Chizuru confronting Sawako about her Heroic Self-Deprecation and telling her what she needed to hear the most.
Ayane: You know, Sawako...our first impression of you was gloomy and out of place, too. But now, we know how cute and sweet you are. We love you. And it's because you mustered up your courage and fought hard to defend us. You, us, Kazehaya...there's no difference between any of us. Not unless you believe there is.
Episode 8: Ryu giving Chizuru her birthday present while on his daily jog.
Episode 9: Sawako finally finds Kazehaya in the classroom and musters enough courage to confess her love to him.
Sawako: My whole life, all I've ever received from other people are apologies. So when you smiled and thanked me that first day, it made me happier than I'd ever been. Despite that, I've been doing the complete opposite of what you've done for me. And that's why, this time...I want to give you more than an apology. Thank you for smiling at me. Thank you for talking to me. Thank you for being nice to me. Thank you for introducing me to so many new feelings...
Sawako:I don't know the first thing about being a good girlfriend, but-
Kazehaya:Kuronuma, it's not a job. It's not a job. Just be yourself.
Sawako:(tears up) I'm so happy, almost too happy, that sometimes I wish time would pass even faster. Faster. so that being with you would become something normal.
Kazehaya: (hugs Sawako) Don't wish for something so wasteful. I'm sorry. I always thought that only I had feelings for you and not the other way around and that I was the only one who felt such happiness.
Chapter 44: We finally learn when Kazehaya started to fall in love with Sawako.
Ayane confesses to Pin that she doesn't think of herself as a kind person compared to her friends because of how cunning she can be, and dreads another full-of-himself lecture from a surprisingly quiet Pin, who instead stares at a candy Ayane gave him because he was whining about not getting one after the festival. Then, Pin literally pats Ayane on the head and reassures her that she is kind before walking up the stairs, leaving Ayane (and the readers) speechless that Pin could actually have a Pet the Dog moment.
Chizuru shares one with Ryu when she answers him what his strong points are.
Chizuru: You're kind, you're honest, you're caring, and you're patient.
Chapter 46: Sawako and Kazehaya's first date. Every single part of it.
Chapter 48: On the way to her house, Sawako attempts to hold Kazehaya's hand, which takes Kazehaya by surprise. Embarrassed, she apologizes to him and asks him not to hate her. They begin to walk again, this time with Kazehaya's hand holding Sawako's.
Chapter 49: With Kazehaya finally meeting Sawako's parents, he and Sawako wait for dinner in her room. As they sit on both the opposite ends of her table, Kazehaya thinks on how far she has changed from being so shy and the earlier incident of Sawako attempting to hold his hand and asking him not to hate her. He then surprises Sawako by saying this:
Kazehaya: There's no way I'll ever hate you...
Another one happens when Sawako's father approves of Kazehaya dating his daughter.
Mr. Kuronuma: Why does it have to be Sawako? Can't you do this kind of thing with other girls?
Kazehaya: No. It can only be your daughter.
Chapter 50: How Chizuru and Ayane became friends.
Chapter 52: Near the end of the chapter, both Sawako and Shota tell each other when they started to fall for the other.
Chapter 89: Sawako and Kurumi. They've certainly come a long way.
Kurumi's return several chapters earlier bears mentioning too, especially when she kept repeating that she "had a bad personality" only for Sawako to keep refuting it to the point where Sawako just finally yells "You don't have a bad personality!" with emotion that surprises ever Kurumi.