Natasha Belova

At the moment, Natasha has two main questlines; the friendship arc and the domination arc (the latter currently has more content). To start either quest, the player must begin by raising relationship with her, which can be done by repeatedly talking to her at school. Once the relationship score has reached 50 or more, you can ask her for help with homework. You will now unlock the 'Natasha's apartment' location, and will be able to visit at times or go home with her after school.

After doing homework with Natasha, you will have a number of new options to raise your relationship. After making small talk at least 3 times, asking her about money may trigger an event in which the PC can choose to loan her some money - the amount will be 5000 the first time, and 2000 any time after that. To continue with either of Natasha's arcs, the PC must accept.
The first three times you loan money, Natasha will promise to pay you back in 30 days. After that, there will be no wait timer. During these 30 days, you will be able to make Natasha do your homework.

Domination Arc

After the first time  you loan her money, and after the thirty day wait is over, talk with Natasha again about money. She will explain that she cannot repay you. To unlock domination content, demand repayment. Now you will slowly be able to corrupt Natasha into doing progressively more things for you. Most actions you make her do will count against the debt - when she no longer owes you money, you will have to loan her another 2000. For the second and third times you do this, you will have to wait another 30 days before you can unlock any more domination content - but after that you will be able to control her immediately after loaning the money.

From now on, as long as you have made Natasha do your homework at least three times, forcing her to do it will unlock new content. Over time you will corrupt her more; first making her do it in her underwear, and then nude, and then to have sex with you afterwards. When in Natasha's apartment, as you corrupt her you will successively unlock the abilities to make her lick your feet, spit in her mouth, or eat you out; each will repay 500 debt. When making her eat you out, if it is one of the first times you have done it, she will do a bad job, and the player can punish her with a golden shower.

From your home, in the mornings, you can also make her carry your books to school. If you have corrupted her enough, at this stage you can remove her panties and force her to wear them 'somewhere special'. While doing this, there is a 20% chance you will encounter Kolka and decide to tease him by flashing him Natasha's ass. You can then talk about this with Kolka when you meet him in your parents' living room, and offer to set something up with him (although this will require Natasha to have been sufficiently corrupted already, 

Note: It is important that you go through all the corruption options, or the dialogue option with Kolka will not show up.

As you repeatedly make Natasha have sex with him, you will slowly unlock more of this content - and each time debt is reduced by 500. Eventually, you will unlock the option to make Kolka cum on her pussy or belly; when doing either, there is a 10% chance he will fail to pull out in time. After that happens, you can make him cum inside again whenever you want, which will always give a 5% chance of impregnating Natasha. At the moment, there is no significant pregnancy content for Natasha that I am aware of other than some dialogue involving her being pregnant potentially with your nephew or cousin.

If the PC has had sex with Olu, you will be able to make Natasha have sex with him.

In her apartment kitchen, you can find a cucumber in the fridge. Given sufficient corruption, this will unlock the ability to make Natasha masturbate with it.

You can buy some special lingerie for Natasha from the Fashionista shop in the city mall, and make her wear it.

She can be encountered while hanging out with Katja, with several options available.  It is possible to take her back to Katja's house and have a threesome if she is your slave.

For now, content after this point - which involved having a threesome with Julia - has been removed. At time of writing, there is no active development on this arc.

Friendship/Love Arc

I will hopefully finish this with help from BBZ01 in the next few days. -Pocket

If you instead wish to go down the friendship path, after the first time you loan her money, and after the 30 days have passed, you can choose to forgive Natasha's debt. You can then ask Natasha what she spent the money on, at which point it will be revealed that she is in debt to Christina. You can now either promise to pay back the debt yourself, or leave Natasha to do it. In the first case, you will need 500 rubles, and then to visit Christina during the school lunchtime. Either way,  talk to Natasha again the next day to continue.

You will now have a few new interactions with Natasha. From her apartment bedroom, hanging out with her can lead to any of: walking in the park, walking around town, handing out flyers together, or - only during daytime hours (08:00-19:00), visiting the cafe. Each of these choices will improve your relationship with her. You will also be able to kiss her assuming you haven't started the disco events described below, but this will not make her your girlfriend.

To progress further, while in her room, talk to Natasha about the fashion magazines she has. This will allow you to arrange a shopping trip together. After waiting two weeks, and while having 2000 rubles, go back to Natasha's room one weekend before 15:00 to start the trip. 

Wait another week, and then talk to Natasha about the trip. You will now be able to convince her to come to the disco with you; see her again on Friday between 19:00 and 20:00 to begin this event. After your night out, you will have the option to kiss Natasha and become her girlfriend, or to remain just friends for now. Should you remain friends, you will still be able to become Natasha's girlfriend by kissing her in her bedroom whenever you choose.

If you have become Natasha's girlfriend and have advanced Christina's storyline to the point of either beating her in a fight or blackmailing her, you will be able to talk to Christina in school and get her to stop bullying Natasha.

For now, this is the end of the friendship arc, but as of December 2022 it is being actively developed by BBZ01.