Source: https://kakuyomu.jp/works/16817330659490948940
Synopsis
The main character, Endo Munehitsu, loves to draw and enjoys a simple high school life. He leads an ordinary student life, talking only occasionally with his childhood friend Tsukishima, an innocent girl. Since there was no art club, he monopolized the art room after school and practiced drawing diligently. One day, Munehitsu is paired with Myoudou Rin, a gyaru who is rumored to be the number one bitch in her grade, and he happens to be interested in her. Myoudou insists that she must pay back any debt she owes and offers to be an art model in the art room after school.
His childhood friend Tsukishima Mei overhears this and wants to come over to his house…….
Chapter 1 Myoudou san is the Number 1 Bitch in School
Episode 1 – A Real Cheery Person is Dazzling
Episode 2- Shall I take it off for you, Otaku kun?
Episode 3 – I’ll be your art model
Rin Side* My head is full of Otaku kun
Episode 4 – Good morning, Otaku kun
Episode 5 – The Beginning of the Secret
Chapter 2 My Childhood Friend is Acting Weird
Episode 6 – Childhood Friend, Tsukishima Mei
Episode 7 – Tsukishima Seems Strange
Episode 8 – What kind of girl does Enpitsu like?
Mei Side* Enpitsu will always be mine
Episode 9 – Wanna come home together?
Episode 10 – My Childhood Friend Approaches
Episode 11 – Tsukishima Turned Into a Yandere
Chapter 3 I Want to Become Friends With Otaku kun
Episode 12 – I Want You to Draw Me in Sexy Underwear
Episode 13 – Otaku Kun Has a Hard Time Too
Episode 14 – Wanna Touch it…..? Mine
Episode 15 – I Took Otaku kun’s First Time
Rin Side＊I’m nervous about Otaku kun…..
Chapter 4 Let’s Go on a Date
Episode 16 – Can I voice call you in bed?