Narikiri Mahou Shoujo Bokos (“Roleplaying Magical Girl Bokos”) [English], by Meetban (AKA Miitoban)
The female MC is a huge tsundere, firmly opposed to having cosplay sex even when her boyfriend begs… However, when he pulls out his hand-made Magical Girl Pugilist Bokos, she gives in, because she was a huge Magical Girl Pugilist Bokos fan in the past.
…
And now let’s briefly stop to appreciate the sheer thought of a PUGILIST motherfucking magical girl lol ^^;;
The rest is fairly decent sex, however I’m afraid the whiteout censorship method will wreck it for most of you. Well, it’s up to you, I’d recommend it for the mere tsundere factor, the hentai is a bonus
For this quality vanilla and tsundere moment, lots of thanks to Crystalium, Kage15, Amalthea, EcchiNeko, Freudia and HayateK4L, from Team Koinaka! ^_^
–Update: I had totally missed it, thanks to the kind Anon who left a comment about that: the mangaka is “actually” Miitoban, aka Nikuman Umeew. “Meetban” looks like a poor porting to English.
By the same artist, under the names Miitoban, Nikuman Umeew or Meetban, I also share Mitain Desu (“I Want To See It”), Gekkan Za Bicchi Wo Mita Onna No Hannou Ni Tsuite, Dragon Girl, Majin Zenzen, Ihara-chan Wa Futoppara, Jinrui Niha Hokentaiiku Ga Hituyoudesu (“Humanity Needs Health and Physical Education”) and Different World Girl and its short sequel Different World Girl 1.5.
There are two more Different World volumes, but I hesitate about sharing them, they didn’t impress me, so maybe I’ll wait for yet another volume to come, and bam! repack time.