Tenchi Muyou! in Love 2: Harukanaru Omoi

Surprisingly, no one noticed the striking similarities between both films. One can seriously say that the author of The Disappearance of Haruhi Suzumiya may have received some inspiration from Tenchi Forever. Both... +Are based in popular franchises. (Duh!) +Escapes the usual trappings of anime movies based on popular franchises. They're not the standard cash-in films. Actually providing more than just "A fun romp with our favorite characters in a largely ineffectual story!". +Are about the disappearance of a central character and how people close to them are affected by their absence. +Have a more mature and somber tone than the series it originates from. More slower paced, whilst introspective too. +Contains no real villain, but instead a cause behind the conflict. The "causer" have very sympathetic reasons behind their actions, making it hard for the viewer to hate them for it. +Dabbles in time travel/alternate dimension mythos. +Are emotionally rich, with characters that obtain depth never seen in their respective series beforehand. +Possess beautiful, high quality artwork. Disappearance has great digital animation, while Tenchi Forever has great traditional animation. +Include incredible background music. While Disappearance is more of a mystery and Tenchi Forever is more of a romance, I believe that if you liked one you WILL like the other.  read more 

Both series belong to the older generation of romance movies. I think the artwork/tone/pace have some semblances.  

Two mature final movies to what are two mostly childish, haremish romantic comedies. Tenchi 3, in particular, isn't loved because it differed so greatly from what came before; disconnecting it from the fun-loving fanbase. KOR: Summer's Beginning probably suffered as a result of its tone being so different from the silliness that preceded it, too... though I'm sure it - a light novel adaptation - also satisfied a great many because it provided the perfect pay-off for long-time fans; also resolving the Hikari subplot. In the previous offerings of both KOR and Tenchi, there wasn't any sex and the subject was dealt with in an immature manner - as you'd expect of typical rom-com works. But Tenchi 3 went in a totally different direction; bringing in a new female character, having her live with Tenchi and the two having sex - much to the annoyance of those with favourite Tenchi pairings. And, as for KOR: Summer's Beginning, it provided the mature writing and closure to the main relationship I wanted to see in what came before; the main two finally doing the deed and acting like adults throughout as they conversed. read more