Don't listen to him! Here's a list of her chapters, read them and then drop it!
16 - Introduction
22 - Nariyuki goes to her room for the first time
27 - Rizu does delivery to sensei's house. Roach-kun
28 - Group chapter. Bra store
34 - Maid sensei. First time getting drunk
37 - Group chapter. Curry
38 - Group chapter. Festival
41 - School Uniform sensei
45 - Miharu begins
46 - The Miharu knight
49 - Beach chapter
54 - Group chapter. Senpai cleans around
55 - Group chapter. I Love You game
56 - Sleepy, forgetful sensei
61 - Sensei costume showcase
63 - Sensei teaches Nariyuki how to swim
64 - Festival starts
65 - Mahou Josei Mafuyu-chan
66 - Mahou Josei Mafuyu-chan: Nyapoleon edition
69 - Festival ends
72 - Uruka's NTR extravaganza
74 - Nariyuki teaches sensei how to cook
79 - Sensei reaches her first multiple orgasm with Nariyuki's magic fingers
80 - Fun bath times
84 - Subtle shoujo manga chapter.
93 - Married life with Mafuyu.
100-102 - Sensei arc,operation "Best Girl"