Anime Crossover: Ultraman Ginga from the Start

I thought the cover featured the female lead.

I feel like I've read this book before... [What][What][What]

Is it a multi-female lead or no female lead? It's quite heartwarming and very enjoyable. Hopefully they won't run away.

Multiple female leads or single female lead?

Looking at the cover, I thought it featured a female protagonist, but it turns out it doesn't. It's still alright, quite pretty. However, judging from the author's comments, it seems like it'll be ending soon.