Chemisorption on graphene and silicene may realize Martini type π-electron network. It implies specific band dispersion. We propose potential materialization by using the molecular orbital construction and density functional theory. Look at the paper, “Unconventional gapless semiconductor in extended martini network in honeycomb covalent materials” by Tomonari Mizoguchi, Yanlin Gao, Mina Maruyama, Yasuhiro Hatsugai, and Susumu Okada, published in Phys. Rev. B. on 13 March, 2023 (accepted on 21 February 2023). See also arXiv:2209.00775.