A childhood friend who makes him tingle when she gets near. ❤ 
1. JK-chan to Toshigoro-kun #1 (JKちゃんと年頃くん #1); Weekly Kairaku-ten Vol.58 
2. JK-chan to Toshigoro-kun #2 (JKちゃんと年頃くん #2); Weekly Kairaku-ten Vol.63 
3. JK-chan to Toshigoro-kun #3 (JKちゃんと年頃くん #3); Weekly Kairaku-ten 2021 No.16
 
Note: A compilation version, which compiles the first two chapters, was released on Apr 28, 2021.

1. Shinmai Nurse (Shoujo) no Hatsutaiken (新米ナース（処女）の初体験); Comic X-Eros #100 
2. Gal JK Reina Senpai no Ichiya (ギャルJKれいな先輩の一夜); Comic X-Eros #91 
3. Akogare Hatsutaiken #1 (あこがれ初体験♡#１); Weekly Kairaku-ten 2021 No.28 
4. Akogare Hatsutaiken #2 (あこがれ初体験♡#２); Weekly Kairaku-ten 2021 No.33 
5. Kitsune no Hatsujouki Iri (狐の発情期入り); Comic X-Eros #87 
6. JK-chan to Toshigoro-kun #1 (JKちゃんと年頃くん #1); Weekly Kairaku-ten Vol.58 
7. JK-chan to Toshigoro-kun #2 (JKちゃんと年頃くん #2); Weekly Kairaku-ten Vol.63 
8. JK-chan to Toshigoro-kun Gojitsudan 後日談 (JKちゃんと年頃くん #3); Weekly Kairaku-ten 2021 No.16

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