A simple original one-shot H-manga where the main title (English: "Tanashi-san Sitting On My Lap") and description on the MAL page ("With not enough room in the car, Tanashi has to sit on Kodaira's lap. Will he use this chance to get closer to her, or simply enjoy the ride?") are as spoiler-free a vanilla 20-25 page H-manga description can get while giving the basic premise.
The story is about as vanilla as H-manga can get. A guy and girl likes each other but have to get into a relationship through happy fun hot sex. People who think vanilla stories are too boring probably won't care
for this much while basic vanilla lovers like me will have a much higher chance of liking it.
The overall art is pretty alright/decent as far as original doujin material goes. The main guy is your typical plain jane looking protag. The girl is fairly cute with short hair and decent detail put into her oppai but most especially her booty. There are a few other characters that show up but they only make a few appearances and not much detail was put into them. There's not too many background shots but the few that are there do have a decent amount of detail into them. There's censorship on the private parts as always but it's pretty minor and doesn't get in the way too much.
The main 2 characters are likable enough. The main guy's personality is about as plain as his looks: average, a little on the wimpy side, but gets more aggressive in sexual situations like any other guy in vanilla doujins. His main love interest is definitely on the tease-y side. She doesn't have much of personality fleshed out but as far as we know she's someone who likes to oversleep and is cool with teasing her love interest by calling him a virgin pervert with no guts.
So based on the review so far you're probably wondering why I gave the overall thing a 9/10? This is the closest thing to a spoiler I'll have, but despite the H-manga story being very vanilla, there's one thing I love that's underrepresented in Hentai: hot non-penetrative sex. Tanashi sits on the dude's lap with a short skirt in a moving car. I'll let you figure out the rest. I love this part of the doujin because of way it's build up, the dialogue between the two as their attempting what they're doing, and the nice angles and detail between the two's private parts as it's happening.
There's typical vanilla sex as well which is all fine and good but most of the high score is due to simple but underrepresented and imo well-executed part of the non-penetrative sex part to be super good for a typical one-shot length.
Overall, if you're into typical vanilla H manga but you want a little hot non-penetrative sex flair to mix things up, you'll enjoy this simple but hot one-shot.