Seisô hen basically means after so many years have lapsed. i think it's a beautiful production and its really worth a try. a word of caution though, i notice many who followed the anime/Manga didn't find this OVA very worthwhile. but if you didn't, and only watched Tsuioku hen, then your in for an awesome treat. it's mainly Kaoru reminiscing about her and Kenshin's past. about their past encounters and so forth, so to anime viewers, it's more like a whole summary of the series but to non-anime viewers, it's like a whole burst of information! all the stuff you missed out on! though anime viewers say that it isn't accurate. but oh well, i had nothing to lose. Kenshin goes off to china and just doesn't come back, Kaoru's ill after contracting his disease from him but still awaits his return. Kenji, out of frustration, left for Kyoto to seek the skill of Hiten Mitsurugi Ryu from Hiko. Sanosuke manages to find Kenshin only to realise he's lost his memory, only with one thing left: he has to go home. so Sanosuke helps him out, sends him home to japan, back to Kaoru. then this is the best part. *weeps and sobs her head off*
the soundtrack is awesome. i got ordered and imported from Japan, waited a month for it. that's how much i adore it. just listening to the songs with your eyes closed or whatever, brings back all the emotions you felt when you were watching the show. yeah.
by the way, i didn't watch the anime. so it was superb to me.