Rennyuu Tales The Animation is a compilation of 3 short hentai stories. Each story focuses on a different straight couple, quickly establishes their relationship and then immediately proceeds to a sex scene.
I imagine each of these relationships is better developed in the original manga, but out of the 3 we get in this adaptation only the last one has any sort of arc to it. It's about an idol who has difficulty taking sexy photos because she doesn't look "womanly" enough (the photographer's words, not mine). Her solution then is to learn to be confident like grown woman by having sex for the first time
with her boyfriend. It's a dumb litlle storyline but it is kind of cute, and it adds a little more emotion to the sex scene.
The characters and their relationships are actually the best part of this OVA for me, even though I wish there was more of it. The 2 first stories are not as interesting as the last one, but they all try to establish some sort of believable romance between the characters. All the girls have their own personality and relatively creative designs. And even though this is a straight hentai with focus on the female characters, it seems that they did put some effort when creating the male characters as well. This all builds up to make us a little more invested when the sex starts.
Speaking of which... Unfortunately the sex scenes are nothing special. There are no creative situations or positions. Just the same old blowjobs, paizuris and 69s you've seen in a thousand differrent hentais before. The most arousing scenes for me were actually the ecchi scenes before the sex: Nyarko's dance, Rin falling down the stairs, Yuna's photoshoot... But there is nothing great here when it comes to visuals. I mean, I already expressed that I like the character designs, but the animation is as stiff and lifeless as most hentais out there.
Overall this is just... OK. It's a fine hentai that only lasts one episode if you're into straight porn and you have half an hour to masturbate. Just don't go in expecting more than that.