its just a manga. Rewatch some harem animes or read some mangas where MC ends up with all the girls you'll feel better. I was so frustrated upon reaching the conclusion that I just opened every harem isekai trash sh*t that I read and binged
Honestly, everything would have been better if Itsuki was the one getting married let’s be realistic. She was the first one of all to appear, otherwise what’s the point? I will be waiting that ending for a long time...