u/oshmkufa-2010

In both the game and the show, it's explained that once the rounders served their purpose, they get killed so that there are no loose ends. If you screw up, they go after your loved ones.

Yuugo did want Moeka to live, but it means that Nae would end up getting hurt (most likely killed at that), so it actually makes more sense that she died by his hand after all, as he was tasked to kill her in the first place. Remember, failure = your family and friends are in danger.

I think that the D-Mail stuff delaying Mayuri's death did exactly the same to Moeka, changing the way she died (her suicide). Her helping Okabe and exposing Yuugo gave him the necessary push at this point in the story, but eventually he always intended to kill her in order to protect Nae by doing his job. Moeka just couldn't stand being ignored anymore and she broke down.

As I said before, he did want her to live, so regardless of the outcome, he was going to shoot himself in the end out of guilt, murder or not. The reason why it took him too long for Moeka (which lead to her suicide), is because he kept hesitating as he did not want to do it and that he was biding his time, spending as much time as possible with Nae.

Edit: Thank you to all the Anime fans in here for trying to keep my post upvoted haha

I know it's not that deep, but I'm just wondering since he said he did not have a lot of money when he started his business and had to sell his IBN 5100 to "save" Faris. After Suzuha's D-Mail, he never gets the IBN in this particular world-line.

Just making it clear that Lukako is a great character (everyone is) and that the chapter itself is excellent. Her (in that case) ending though is absolutely terrible. Not only terrible as being bad, but also ridiculously laughable. I understand that this is not real and that it's pure fan-service, but Okarin and Lukako deliberately letting Mayuri die like this? I can't even say that it's the epitome of selfishness nor can I use the term evil with how stupid and unbelievable this scenario is. There is no way I could even convince myself that it's the real ending even if I were into this ship (let alone any). In Suzuha's ending, he goes back to the past with her to try to find another way to save Mayuri. In Faris' ending, everyone survives, even her dad, so the sacrifice can be understood. As for the Mayuri and Kurisu endings, there are gameplay requirements to reach them like the Steins;Gate one, so fine. but this though? Come on... Also, no offence, but anyone who has this as a head-canon should get therapy lol. I think it's the weak-point of the VN and a reason why I prefer its Anime adaptation.

Edit: Clarifications