Masamune-kun no Revenge: Uchi no Mama ni Kagitte/Tsunade Shima, Futatabi./12-Ji wo Sugita Cinderella

Basically, this OVA is divided into 3 different side stories revolving around different characters and it shall be perceived as a comedic nostalgic effect on fans of the series.

The first part revolves around Masamune's family and introduces his cousin and his cousin's daughter. The main plot point is that these two can look exactly like Masamune's mother which causes for Masamune confusion and for the viewers, or at least it should cause fun.

The second part revolves around our girls + trap cast going to a sea vacation together.
Sea? Yeah, that's right, your girls will be in swimsuits, enjoy.

The third part revolves around Yoshino. ... Yoshino's older sister makes an appearance as she dresses Yoshino in her clothes, which cause little fanservice scenes. The third part has Yoshino's character developing a little when she reminded of past's memories.

To summarize:
The first part is a totally comedic episode.
The second has fanservice and romance.
The third has a focus on one character.

The character designs are the same, aren't made for animation but for pretty art.
Don't expect good storyboard or character acting.

The soundtrack is barely noticeable, the opening and the ending recite on this episode which was a bit nostalgic.

I recommend it only for the fans of the series. If you weren't a fan of the 12 episodes tv series then you should stay away from this side stories, they don't have a change from the original series.

Thanks for reading, hope it helps you.

Oh look, it's that show where the fat guy works himself up to get revenge on that one girl who rejected him on his child-days, feels old yet?
Masamune-kun no Revenge OVA, as obvious as it sounds is an OVA for the parent series with the same name minus the last 3 (or 4 including the space character) characters is yet another peek at the daily lives of the portrayed cast. This is not a sequel or a prequel but rather just extra content that you may insert at some point from watching the series, so the order doesn't really matter that much, at least watch ... this after the beach episodes. Masamune-kun no Revenge was a series that hasn't aged well in my memory aside from its plot idea of revenge, I couldn't recall any character names or chronological order to keep up along, but it didn't stop me from enjoying this short.

- Story (6.0/10):
The OVA follows three different stories with different contexts resolving around friends and family.
The first was looking at Masamune meeting his Aunt that looks exactly like his loli mother, and that has a daughter that's just as prominent as her. The trio goes as far as annoying the heck out of the protagonist giving him a hard time telling them apart.
Then came the second snapshot that focused on his female classmates going on a beach vacation without him, having fun at the beach, trying swimsuits (there is always room for fanservice) and doing some girly stuff.
The third and the last was, in my opinion, the most deserving out of the bunch, it follows Yoshino probably for the first time dressing and having a princess makeup, she goes through a monologue for the most part on why she feels so empty and lonely most of the time.
Those where some pretty basic side stories to get to know the characters more, probably setting up for a near sequel.

- Art (8.3/10):
I've never had problems with the art in this franchise, the girls look cute, the anatomy isn't dragged on and the movements feel normal.
I like the details the put on the characters' eyes, they give way more personality to them and even back up the statement “The eyes are mirrors of the soul” pretty well. The use of vibrant colors is never disappointing if used right.

- Sound (7.0/10):
I never lose it when talking about sound acting in shows like this, the more pitches a loli voice gets the more transparent it becomes to me to take seriously. The only thing I really feel nostalgic about is the opening theme song, I don't know why the ending one never clicked to me though.

- Character (7.0/10):
It was nice to see a buildup for characters, especially Yushino, they all feel like they went through a massive change from what I can remember, it's stories like these that level up characters, giving us their motives really helps. But then again, the cast is not a small one, and not everybody is having the same treatment, I'd say at most it's always Masamune, Aki, and Yoshino.

- Enjoyment (6.0/10):
The ride was all... Meh. I didn't expect more to be honest, but it was enough to stop me from sighing from boredom. I don't consider myself as a hardcore fan of the series, or even the genre, but I still had a catch from watching this, and I only expect people that like this sort of stuff to love this, but still it's not mandatory to see. The shorts do not contribute to the main plot so it all feels like a select of fillers disguised under a 23 minutes OVA.

- Overall (6.9/10):
I don't see this aging any better than the main franchise, I feel like the trend has toned down quite a bit so this might not be as prominent as it may have been a year ago. I nonetheless had my share of swimsuit sighting for the day, so I beg your pardon.

English.
Well, they want me to tell you this special episode is not bad but the truth is it is very unnecessary, they do not show us anything new and I think that if it had not existed nothing would have changed.
The three stories are not relevant at all and I think that as a special episode it does not add anything, for me even if it is a special episode it must show at least something interesting or solve a mini problem of the series, none of that happens here and that is where it lies my problem.
If you want to see it, watch it, ... you might be interested, but for me it was a not very entertaining episode that I think you can put aside and I wouldn't have missed anything new.

Español.
Pues que quieren que les diga este episodios especial no esta mal pero la verdad es muy inecesario, no nos muestran nada nuevo y creo que si no hubiera existido no hubiera cambiado nada.
Las tres historias no son nada relevantes y creo que como episodio especial no agrega nada, para mi aunque sea un episodio especial debe de mostrar mínimo algo interesante o resolver un mini problema de la serie, aquí no sucede nada de eso y es ahí donde radica mi problema.
Si tienes ganas de verlo véanlo les puede llegar a interesar pero para mi fue un episodio nada entretenido que creo lo puedes dejar de lado y no me hubiera perdido nada nuevo.