Huge swaths of text and translation notes do not go well together, so I'm just going to put the translations in the comments here.
Eirin: "Kaguya and Mokou have been getting along well lately, haven't they? They haven't even been having their deathmatches." Keine: "That's fine, isn't it? This is better than that dangerous stuff anyway." Eirin: "Is that really what you think?" Keine: "...What are you trying to say?" Eirin: "I have no ulterior motive. I just thought that you were rather interested in Mokou." Keine: "...It's my mission to protect humans. Mokou's more pessimistic, so I had more opportunities to intervene with her than with other humans. That's all." Eirin: "...Hmmm?" Keine: "What are you trying to say?" Eirin: "You know, I..." Keine: "?" Eirin: "Kaguya is more precious to me than anyone else." Keine: "...Well, yeah." Eirin: "You could even say I love her." Keine: "..." Eirin: "Ever since she met Mokou, she's been in a daze, without eyes for anything else." Keine: "..." Eirin: "It would seem I've loved and lost." Keine: "...Is that so." Eirin: "You're not familiar with the feeling?"
Keine: "...Maybe I am. Since she met Kaguya, Mokou's been so lively. It's completely different from how she was before." Eirin: "We have it tough, hm? The two of us." Keine: "Yeah. We do." Eirin: "So..." Keine: "What are you getting so close for?" Eirin: "...if we're both heartbroken, don't you think we should lick each other's wounds?" Keine: "Wha?! Oi, come on, quit it!" Eirin: "Body warmth is a cure for a broken heart, you know." Keine: "That's not reason enough for me to do this with you!" Eirin: "...It's fine, isn't it? Go on, look at Mokou, enjoying herself over there. You understand, don't you? There's no way she'll ever look back at you again." Keine: "I... I understand that!" Eirin: "Liar. You don't understand anything. You don't want to. That expression on your face really is painful. How sad. But no matter how much you grieve, Mokou will never see it. She won't be yours. And for a hourai, that means forever. Aah, how sad for you, Keine. It truly is sad." Keine: "T-that... that's not..." Eirin: "Aah, don't cry, Keine. I told you, it's hard for me, too. Let's console each other. Us two, whose wishes will never be granted, whose dreams will never come true." Keine: "Aah... S... sto..." Eirin: "It's okay. You don't have to do anything. I'll do it all..."
Kaguya and Mokou have been getting along well lately, haven't they? They haven't even been having their deathmatches.Liar. You don't understand anything. You don't want to. That expression on your face really is painful. How sad. But no matter how much you grieve, Mokou will never see it. She won't be yours. And for a hourai, that means forever. Aah, how sad for you, Keine. It truly is sad.It's okay. You don't have to do anything. I'll do it all...Yeah. We do.T-that... that's not...We have it tough, hm? The two of us.What are you getting so close for?Wha?! Oi, come on, quit it!...Hmmm?You're not familiar with the feeling?...What are you trying to say?You could even say I love her.That's fine, isn't it? This is better than that dangerous stuff anyway.Is that really what you think?I have no ulterior motive. I just thought that you were rather interested in Mokou.Ever since she met Mokou, she's been in a daze, without eyes for anything else.It would seem I've loved and lost.Aah... S... sto......It's my mission to protect humans. Mokou's more pessimistic, so I had more opportunities to intervene with her than with other humans. That's all.What are you trying to say?...Is that so....It's fine, isn't it? Go on, look at Mokou, enjoying herself over there. You understand, don't you? There's no way she'll ever look back at you again.You know, I...Kaguya is more precious to me than anyone else.I... I understand that!Aah, don't cry, Keine. I told you, it's hard for me, too. Let's console each other. Us two, whose wishes will never be granted, whose dreams will never come true....Well, yeah.So......if we're both heartbroken, don't you think we should lick each other's wounds?...Maybe I am. Since she met Kaguya, Mokou's been so lively. It's completely different from how she was before.Body warmth is a cure for a broken heart, you know.That's not reason enough for me to do this with you!