Does Summertime Rendering anime have a happy ending?

The anime adaptation of Yasuki Tanaka's Summertime Rendering has received critical acclaim from fans of the manga all over the world.

Summer Time Rendering - Rotten Tomatoes

Summertime Render - 25 (End) and Series Review - Lost in Anime

Summertime Render – RABUJOI – An Anime Blog

Summertime Render Episode 25 Discussion (120 - ) - Forums

Haine, Summer Time Rendering Wiki

What the Hell is Going On In Summer Time Rendering? - This Week in Anime - Anime News Network

Summertime Rendering Vols. 1 & 2 - The Comics Journal

Hizuru Minakata, Summer Time Rendering Wiki

Summertime Render - 25 (End) and Series Review - Lost in Anime

Can somebody explain the ending of Summertime Render to me? Why did Shinpei time travel one last time to a world where everything was okay, nobody was dead, and it seems like

Summertime Render - 25 (End) and Series Review - Lost in Anime