You get the option to buy condoms in the early days you can sleep with her, but you need to have least 100 money in pockets. For safety reason it best buy first condoms and then nano bots on lover path, but if skip the first day spending together and go work instead you could still buy nanobots and then condoms. On NTR path i don't think you can buy condoms, and the moments ya can have sex with her she does it anyway raw as she already used to it with Matt.How do you freakin buy condoms?!?!