Episode 1 - 2 part 1 - Muramata-san no Himitsu 
She has a secret. After one of her subordinates wasn't performing the way she would have liked she invited him to her house in the hopes of encouring him and causing his performance to increase. Unfortunately, it looks like he caught on to her little secret. 
 
Episode 2 part 2 - Momose wa Shiru 
The four heavenly queens of school, an unapproachable challenge. When one of them asks you for help, you help! But what's this... she wants to learn how to make her cock bigger!? What?

1-3. Muramata-san no Himitsu (村又さんの秘密, Muramata-san's Secret); Comic Hotmilk 2019-01, 07, 10 
Muramata-san is the local senpai at our main character's office. She's fun and cheerful, but she also has a big secret? 
 
4. Sobaya no Haru-san (蕎麦屋の春さん, The Soba Restaurant's Haru-san); Comic Hotmilk 2019-03 
5. Momose wa Shiru (百瀬は知る); Comic Hotmilk 2018-11 
6. Backstage (バックステージ); Comic Hotmilk 2014-12 
7. Ame yo Muchi yo, Yumi to Gen (飴よ鞭よ、弓と弦); Comic Hotmilk 2014-06 
8. Marching (MARCHING！); Comic Hotmilk 2014-04