[18] On August 27, Shin released his fourth digital single, "Flip", featuring South Korean rapper Beenzino.

[21] On October 27, 2020, Cube announced that they have formed a unit called BtoB 4U consisting Peniel, Eunkwang, Minhyuk and Changsub.

[26] In 2017, Shin held his first photography exhibition, titled "Penography", at White Studio gallery in Yeongdeungpo-gu, Seoul from March 30 to April 12.

[29] In 2018, Shin held his second photography exhibition, "SECOND PENOGRAPHY", at Gallery Qum in Seongdong District, Seoul from November 23 to December 2.

In July, Shin began hosting the Dive Studios podcast GET REAL alongside BM (of KARD) and Ashley Choi (formerly of Ladies' Code).

[36][37] In November 2016, Shin participated as a guest in the South Korean reality show KBS2's Hello Counselor episode 299, opening up about suffering from Alopecia areata.

The broadcast was natural and my close friends knew, It was very frustrating, but I finally made it public through Hello, so I feel really comfortable.

"[41] As for the reason that he has not disclosed hair loss so far, Peniel said, "I just wanted to go confidently, but I had to hide it for five years after my debut considering the company, members and fans.

"[42] After the confession, BtoB members leaving affectionate support posts on their Instagram, such as Yook Sung-jae's "Peniel, you got the sweetest heart in the world.