Previously Shinjiro had an encounter with an alien called Red. Their battle is here in this great chapter of the Ultraman Manga. This one has everything the previous one lacked: Ultraman himself, a fantastic fight, and a major plot development. Moroboshi confirms that Shinjiro isn't the only one that can transform into Ultraman. This should open up for some pretty interesting things in the coming chapters. But first, Chapter Eighteen.
The story picks up where the previous chapter left off. Shinjiro has a fight with Red. Sadly he realizes he doesn't have the costume, so before he gets pummeled Moroboshi breaks up the fight and has him get away from the alien city. Later an investigation in a warehouse leads Moroboshi and Ultraman to run into a (pathetic) alien. The first part is centered around the fight between Shin and Red. It's fantastic, in both the actual blows thrown and art. Red actually has some of his dialogue translated, which was good. Hopefully we'll see him again in the near future.
The second act starts when Moroboshi gets Shin away from the alien city. Moroboshi reveals to him that he's not the only being that can change into Ultraman. It'll be intriguing to see everything surrounding what that means. The whole warehouse scene was good. The unnamed alien is pretty weak though, even begging for mercy. Shin (as Ultraman) spares him, which is a pretty interesting development. It shows he has a merciful heart. Rena returns for a short scene with her dad. He is becoming increasingly annoying, disliking Ultraman for no real good reason. Hopefully this won't evolve into some kind of petty grudge throughout the series.
Overall, Chapter Eighteen is a great chapter. It features a fantastic fight and some Ultraman action later on. The story itself doesn't move much though, hopefully Bemular returns soon.