Alright, bear with me since it has been a very long time and I can’t get it out of my head. I can’t for the live of me find what the title is. My memory may also be jumbled and mixed up so apologies in advance. Heck, I even forgot if this is anime or not, hentai or not and hesitate to ask here, but I think it’s probably a manga and not a hentai either. I really wanted to read it again.

All I remember is:

• The world time is stopped but the time for the characters is not stopped (they still grow old)
• The ending is somewhat bittersweet as it follows a scene on the beach/sea view with a flock of birds that was once time-stopped, resumed flapping indicating that time has returned to normal
• The power to stop the time is prolonged by each use (or was it their proximity?)
• I forgot how both characters meet and this may come from other manga, but I remember it was also time-stop on a busy street and they notice each can still move