BattleSexer Seishiro

In the 23rd century, a time dominated by science and technology, reproduction no longer requires sex. Despite this, sex has not been forgotten; it has transformed into a martial art practiced by individuals known as BattleSexers. The story is part of a special manga series published in Young Magazine the 3rd, Vol. 4 in 2015, titled "Ore no The 100th!!," in which established manga artists each write the 100th chapter of a new title without prior involvement in the earlier chapters.